<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>401</ContextCount>
  <ElementCount>535</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>107</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DocumentandEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Statement - Consolidated Statement of Financial Position (Statement)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/ConsolidatedStatementofFinancialPositionStatement</Role>
      <ShortName>Consolidated Statement of Financial Position (Statement)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0000003 - Statement - Consolidated Statement of Profit or Loss (Statement)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/ConsolidatedStatementofProfitorLossStatement</Role>
      <ShortName>Consolidated Statement of Profit or Loss (Statement)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0000004 - Statement - Statement of comprehensive income, OCI components presented net of tax (Statement)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/StatementofcomprehensiveincomeOCIcomponentspresentednetoftaxStatement</Role>
      <ShortName>Statement of comprehensive income, OCI components presented net of tax (Statement)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0000005 - Statement - Consolidated Statement of Changes in Equity (Statement)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/ConsolidatedStatementofChangesinEquityStatement</Role>
      <ShortName>Consolidated Statement of Changes in Equity (Statement)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0000006 - Statement - Consolidated Statement of Cash Flows (Statement)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/ConsolidatedStatementofCashFlowsStatement</Role>
      <ShortName>Consolidated Statement of Cash Flows (Statement)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0000008 - Disclosure - General Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/GeneralInformation</Role>
      <ShortName>General Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0000009 - Disclosure - Basis of preparation of the financial statements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Basisofpreparationofthefinancialstatements</Role>
      <ShortName>Basis of preparation of the financial statements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>0000010 - Disclosure - Summary of significant accounting policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Summaryofsignificantaccountingpolicies</Role>
      <ShortName>Summary of significant accounting policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>0000011 - Disclosure - Use of critical estimates and judgements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Useofcriticalestimatesandjudgements</Role>
      <ShortName>Use of critical estimates and judgements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>0000012 - Disclosure - Group structure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Groupstructure</Role>
      <ShortName>Group structure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>0000013 - Disclosure - Business combinations and capital reorganization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Businesscombinationsandcapitalreorganization</Role>
      <ShortName>Business combinations and capital reorganization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>0000014 - Disclosure - Cash and cash equivalents</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Cashandcashequivalents</Role>
      <ShortName>Cash and cash equivalents</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>0000015 - Disclosure - Trade receivables and other payables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Tradereceivablesandotherpayables</Role>
      <ShortName>Trade receivables and other payables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>0000016 - Disclosure - Prepaid expenses and other assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Prepaidexpensesandotherassets</Role>
      <ShortName>Prepaid expenses and other assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>0000017 - Disclosure - Income tax</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Incometax</Role>
      <ShortName>Income tax</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>0000018 - Disclosure - Intangible Assets, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IntangibleAssetsnet</Role>
      <ShortName>Intangible Assets, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>0000019 - Disclosure - Property, plant and equipment, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Propertyplantandequipmentnet</Role>
      <ShortName>Property, plant and equipment, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>0000020 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>0000022 - Disclosure - Defered consideration, contingent liabilities and others</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Deferedconsiderationcontingentliabilitiesandothers</Role>
      <ShortName>Defered consideration, contingent liabilities and others</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>0000023 - Disclosure - Derivatives and hedge activities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Derivativesandhedgeactivities</Role>
      <ShortName>Derivatives and hedge activities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>0000024 - Disclosure - Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Equity</Role>
      <ShortName>Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>0000025 - Disclosure - Non-controlling shareholders</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Noncontrollingshareholders</Role>
      <ShortName>Non-controlling shareholders</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>0000026 - Disclosure - Stock option plan</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Stockoptionplan</Role>
      <ShortName>Stock option plan</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>0000027 - Disclosure - Revenues</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Revenues</Role>
      <ShortName>Revenues</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>0000028 - Disclosure - Costs and expenses by nature</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Costsandexpensesbynature</Role>
      <ShortName>Costs and expenses by nature</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>0000029 - Disclosure - Financial income and expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Financialincomeandexpenses</Role>
      <ShortName>Financial income and expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>0000030 - Disclosure - Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/RelatedParties</Role>
      <ShortName>Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>0000031 - Disclosure - Financial instruments by categories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Financialinstrumentsbycategories</Role>
      <ShortName>Financial instruments by categories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>0000032 - Disclosure - Losses per share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/Lossespershare</Role>
      <ShortName>Losses per share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>0000033 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>0000034 - Disclosure - Summary of significant accounting policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesPolicies</Role>
      <ShortName>Summary of significant accounting policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>0000035 - Disclosure - Summary of significant accounting policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesTables</Role>
      <ShortName>Summary of significant accounting policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Summaryofsignificantaccountingpolicies</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>0000036 - Disclosure - Group structure (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/GroupstructureTables</Role>
      <ShortName>Group structure (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Groupstructure</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>0000037 - Disclosure - Business combinations and capital reorganization (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</Role>
      <ShortName>Business combinations and capital reorganization (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Businesscombinationsandcapitalreorganization</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>0000038 - Disclosure - Cash and cash equivalents (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/CashandcashequivalentsTables</Role>
      <ShortName>Cash and cash equivalents (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Cashandcashequivalents</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>0000039 - Disclosure - Trade receivables and other payables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/TradereceivablesandotherpayablesTables</Role>
      <ShortName>Trade receivables and other payables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Tradereceivablesandotherpayables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>0000040 - Disclosure - Prepaid expenses and other assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/PrepaidexpensesandotherassetsTables</Role>
      <ShortName>Prepaid expenses and other assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Prepaidexpensesandotherassets</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>0000041 - Disclosure - Income tax (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IncometaxTables</Role>
      <ShortName>Income tax (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Incometax</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>0000042 - Disclosure - Intangible Assets, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IntangibleAssetsnetTables</Role>
      <ShortName>Intangible Assets, net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/IntangibleAssetsnet</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>0000043 - Disclosure - Property, plant and equipment, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/PropertyplantandequipmentnetTables</Role>
      <ShortName>Property, plant and equipment, net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Propertyplantandequipmentnet</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>0000044 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Leases</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>0000045 - Disclosure - Loans and borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LoansandborrowingsTables</Role>
      <ShortName>Loans and borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>0000046 - Disclosure - Defered consideration, contingent liabilities and others (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DeferedconsiderationcontingentliabilitiesandothersTables</Role>
      <ShortName>Defered consideration, contingent liabilities and others (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Deferedconsiderationcontingentliabilitiesandothers</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>0000047 - Disclosure - Derivatives and hedge activities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DerivativesandhedgeactivitiesTables</Role>
      <ShortName>Derivatives and hedge activities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Derivativesandhedgeactivities</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>0000048 - Disclosure - Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/EquityTables</Role>
      <ShortName>Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Equity</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>0000049 - Disclosure - Non-controlling shareholders (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/NoncontrollingshareholdersTables</Role>
      <ShortName>Non-controlling shareholders (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Noncontrollingshareholders</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>0000050 - Disclosure - Stock option plan (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/StockoptionplanTables</Role>
      <ShortName>Stock option plan (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Stockoptionplan</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>0000051 - Disclosure - Revenues (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/RevenuesTables</Role>
      <ShortName>Revenues (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Revenues</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>0000052 - Disclosure - Costs and expenses by nature (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/CostsandexpensesbynatureTables</Role>
      <ShortName>Costs and expenses by nature (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Costsandexpensesbynature</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>0000053 - Disclosure - Financial income and expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialincomeandexpensesTables</Role>
      <ShortName>Financial income and expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Financialincomeandexpenses</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>0000054 - Disclosure - Related Parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/RelatedPartiesTables</Role>
      <ShortName>Related Parties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/RelatedParties</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>0000055 - Disclosure - Financial instruments by categories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</Role>
      <ShortName>Financial instruments by categories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Financialinstrumentsbycategories</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>0000056 - Disclosure - Losses per share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LossespershareTables</Role>
      <ShortName>Losses per share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/Lossespershare</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>0000057 - Disclosure - General Information (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/GeneralInformationDetailsTextuals</Role>
      <ShortName>General Information (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/GeneralInformation</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>0000058 - Disclosure - Summary of significant accounting policies (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesDetails1</Role>
      <ShortName>Summary of significant accounting policies (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>0000059 - Disclosure - Summary of significant accounting policies (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesDetails2</Role>
      <ShortName>Summary of significant accounting policies (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>0000061 - Disclosure - Summary of significant accounting policies (Details Textuals 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesDetailsTextuals1</Role>
      <ShortName>Summary of significant accounting policies (Details Textuals 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>0000062 - Disclosure - Summary of significant accounting policies (Details Textuals 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesDetailsTextuals2</Role>
      <ShortName>Summary of significant accounting policies (Details Textuals 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>0000063 - Disclosure - Summary of significant accounting policies (Details Textuals 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesDetailsTextuals3</Role>
      <ShortName>Summary of significant accounting policies (Details Textuals 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/SummaryofsignificantaccountingpoliciesTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>0000064 - Disclosure - Group structure (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/GroupstructureDetails</Role>
      <ShortName>Group structure (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/GroupstructureTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>0000065 - Disclosure - Business combinations and capital reorganization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationDetails</Role>
      <ShortName>Business combinations and capital reorganization (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>0000066 - Disclosure - Business combinations and capital reorganization (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationDetails1</Role>
      <ShortName>Business combinations and capital reorganization (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>0000067 - Disclosure - Business combinations and capital reorganization (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationDetails2</Role>
      <ShortName>Business combinations and capital reorganization (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>0000068 - Disclosure - Business combinations and capital reorganization (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationDetails3</Role>
      <ShortName>Business combinations and capital reorganization (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>0000069 - Disclosure - Business combinations and capital reorganization (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationDetails4</Role>
      <ShortName>Business combinations and capital reorganization (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>0000070 - Disclosure - Business combinations and capital reorganization (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationDetailsTextuals</Role>
      <ShortName>Business combinations and capital reorganization (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>0000071 - Disclosure - Business combinations and capital reorganization (Details Textuals 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationDetailsTextuals1</Role>
      <ShortName>Business combinations and capital reorganization (Details Textuals 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>0000072 - Disclosure - Business combinations and capital reorganization (Details Textuals 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationDetailsTextuals2</Role>
      <ShortName>Business combinations and capital reorganization (Details Textuals 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/BusinesscombinationsandcapitalreorganizationTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>0000073 - Disclosure - Cash and cash equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/CashandcashequivalentsDetails</Role>
      <ShortName>Cash and cash equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/CashandcashequivalentsTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>0000075 - Disclosure - Trade receivables and other payables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/TradereceivablesandotherpayablesDetails</Role>
      <ShortName>Trade receivables and other payables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/TradereceivablesandotherpayablesTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>0000076 - Disclosure - Trade receivables and other payables (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/TradereceivablesandotherpayablesDetails2</Role>
      <ShortName>Trade receivables and other payables (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/TradereceivablesandotherpayablesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>0000077 - Disclosure - Trade receivables and other payables (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/TradereceivablesandotherpayablesDetails3</Role>
      <ShortName>Trade receivables and other payables (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/TradereceivablesandotherpayablesTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>0000078 - Disclosure - Trade receivables and other payables (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/TradereceivablesandotherpayablesDetails4</Role>
      <ShortName>Trade receivables and other payables (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/TradereceivablesandotherpayablesTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>0000079 - Disclosure - Prepaid expenses and other assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/PrepaidexpensesandotherassetsDetails</Role>
      <ShortName>Prepaid expenses and other assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/PrepaidexpensesandotherassetsTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>0000080 - Disclosure - Prepaid expenses and other assets (Details textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/PrepaidexpensesandotherassetsDetailstextuals</Role>
      <ShortName>Prepaid expenses and other assets (Details textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/PrepaidexpensesandotherassetsTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>0000081 - Disclosure - Income tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IncometaxDetails</Role>
      <ShortName>Income tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/IncometaxTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>0000082 - Disclosure - Income tax (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IncometaxDetails1</Role>
      <ShortName>Income tax (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/IncometaxTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>0000083 - Disclosure - Income tax (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IncometaxDetails2</Role>
      <ShortName>Income tax (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/IncometaxTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>0000084 - Disclosure - Income tax (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IncometaxDetailsTextuals</Role>
      <ShortName>Income tax (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/IncometaxTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>0000085 - Disclosure - Intangible Assets, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IntangibleAssetsnetDetails</Role>
      <ShortName>Intangible Assets, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/IntangibleAssetsnetTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>0000087 - Disclosure - Intangible Assets, net (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/IntangibleAssetsnetDetailsTextuals</Role>
      <ShortName>Intangible Assets, net (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/IntangibleAssetsnetTables</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>0000088 - Disclosure - Property, plant and equipment, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/PropertyplantandequipmentnetDetails</Role>
      <ShortName>Property, plant and equipment, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/PropertyplantandequipmentnetTables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>0000089 - Disclosure - Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LeasesDetails</Role>
      <ShortName>Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/LeasesTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>0000090 - Disclosure - Leases (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LeasesDetails1</Role>
      <ShortName>Leases (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/LeasesTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>0000091 - Disclosure - Leases (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LeasesDetails2</Role>
      <ShortName>Leases (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/LeasesTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>0000092 - Disclosure - Leases (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LeasesDetails3</Role>
      <ShortName>Leases (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/LeasesTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>0000093 - Disclosure - Loans and borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LoansandborrowingsDetails</Role>
      <ShortName>Loans and borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/LoansandborrowingsTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>0000094 - Disclosure - Loans and borrowings (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LoansandborrowingsDetails1</Role>
      <ShortName>Loans and borrowings (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/LoansandborrowingsTables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>0000095 - Disclosure - Loans and borrowings (Detail Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LoansandborrowingsDetailTextuals</Role>
      <ShortName>Loans and borrowings (Detail Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/LoansandborrowingsTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>0000096 - Disclosure - Defered consideration, contingent liabilities and others (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DeferedconsiderationcontingentliabilitiesandothersDetails</Role>
      <ShortName>Defered consideration, contingent liabilities and others (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DeferedconsiderationcontingentliabilitiesandothersTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>0000097 - Disclosure - Defered consideration, contingent liabilities and others (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DeferedconsiderationcontingentliabilitiesandothersDetailsTextuals</Role>
      <ShortName>Defered consideration, contingent liabilities and others (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DeferedconsiderationcontingentliabilitiesandothersTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>0000098 - Disclosure - Derivatives and hedge activities (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DerivativesandhedgeactivitiesDetails1</Role>
      <ShortName>Derivatives and hedge activities (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DerivativesandhedgeactivitiesTables</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>0000099 - Disclosure - Derivatives and hedge activities (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DerivativesandhedgeactivitiesDetails2</Role>
      <ShortName>Derivatives and hedge activities (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DerivativesandhedgeactivitiesTables</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>0000100 - Disclosure - Derivatives and hedge activities (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DerivativesandhedgeactivitiesDetails3</Role>
      <ShortName>Derivatives and hedge activities (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DerivativesandhedgeactivitiesTables</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>0000101 - Disclosure - Derivatives and hedge activities (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DerivativesandhedgeactivitiesDetails4</Role>
      <ShortName>Derivatives and hedge activities (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DerivativesandhedgeactivitiesTables</ParentRole>
      <Position>96</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>0000102 - Disclosure - Derivatives and hedge activities (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DerivativesandhedgeactivitiesDetails5</Role>
      <ShortName>Derivatives and hedge activities (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DerivativesandhedgeactivitiesTables</ParentRole>
      <Position>97</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>0000103 - Disclosure - Derivatives and hedge activities (Details Textuals 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DerivativesandhedgeactivitiesDetailsTextuals1</Role>
      <ShortName>Derivatives and hedge activities (Details Textuals 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DerivativesandhedgeactivitiesTables</ParentRole>
      <Position>98</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>0000104 - Disclosure - Derivatives and hedge activities (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/DerivativesandhedgeactivitiesDetailsTextuals</Role>
      <ShortName>Derivatives and hedge activities (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/DerivativesandhedgeactivitiesTables</ParentRole>
      <Position>99</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>0000105 - Disclosure - Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/EquityDetails</Role>
      <ShortName>Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/EquityTables</ParentRole>
      <Position>100</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>0000106 - Disclosure - Equity (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/EquityDetailsTextuals</Role>
      <ShortName>Equity (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/EquityTables</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>0000107 - Disclosure - Equity (Details Textuals 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/EquityDetailsTextuals1</Role>
      <ShortName>Equity (Details Textuals 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/EquityTables</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>0000108 - Disclosure - Equity (Details Textuals 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/EquityDetailsTextuals2</Role>
      <ShortName>Equity (Details Textuals 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/EquityTables</ParentRole>
      <Position>103</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>0000109 - Disclosure - Equity (Details Textuals 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/EquityDetailsTextuals3</Role>
      <ShortName>Equity (Details Textuals 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/EquityTables</ParentRole>
      <Position>104</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>0000110 - Disclosure - Non-controlling shareholders (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/NoncontrollingshareholdersDetails</Role>
      <ShortName>Non-controlling shareholders (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/NoncontrollingshareholdersTables</ParentRole>
      <Position>105</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>0000111 - Disclosure - Non-controlling shareholders (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/NoncontrollingshareholdersDetailsTextuals</Role>
      <ShortName>Non-controlling shareholders (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/NoncontrollingshareholdersTables</ParentRole>
      <Position>106</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>0000112 - Disclosure - Stock option plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/StockoptionplanDetails</Role>
      <ShortName>Stock option plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/StockoptionplanTables</ParentRole>
      <Position>107</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>0000113 - Disclosure - Stock option plan (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/StockoptionplanDetailsTextuals</Role>
      <ShortName>Stock option plan (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/StockoptionplanTables</ParentRole>
      <Position>108</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>0000114 - Disclosure - Revenues (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/RevenuesDetails</Role>
      <ShortName>Revenues (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/RevenuesTables</ParentRole>
      <Position>109</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>0000115 - Disclosure - Revenues (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/RevenuesDetails1</Role>
      <ShortName>Revenues (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/RevenuesTables</ParentRole>
      <Position>110</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>0000116 - Disclosure - Revenues (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/RevenuesDetails2</Role>
      <ShortName>Revenues (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/RevenuesTables</ParentRole>
      <Position>111</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>0000117 - Disclosure - Revenues (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/RevenuesDetailsTextuals</Role>
      <ShortName>Revenues (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/RevenuesTables</ParentRole>
      <Position>112</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>0000118 - Disclosure - Costs and expenses by nature (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/CostsandexpensesbynatureDetails</Role>
      <ShortName>Costs and expenses by nature (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/CostsandexpensesbynatureTables</ParentRole>
      <Position>113</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>0000119 - Disclosure - Costs and expenses by nature (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/CostsandexpensesbynatureDetailsTextuals</Role>
      <ShortName>Costs and expenses by nature (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/CostsandexpensesbynatureTables</ParentRole>
      <Position>114</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>0000120 - Disclosure - Financial income and expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialincomeandexpensesDetails</Role>
      <ShortName>Financial income and expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialincomeandexpensesTables</ParentRole>
      <Position>115</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>0000121 - Disclosure - Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/RelatedPartiesDetails</Role>
      <ShortName>Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/RelatedPartiesTables</ParentRole>
      <Position>116</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>0000122 - Disclosure - Financial instruments by categories (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails1</Role>
      <ShortName>Financial instruments by categories (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>117</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>0000123 - Disclosure - Financial instruments by categories (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails2</Role>
      <ShortName>Financial instruments by categories (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>118</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>0000124 - Disclosure - Financial instruments by categories (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails3</Role>
      <ShortName>Financial instruments by categories (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>119</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>0000125 - Disclosure - Financial instruments by categories (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails4</Role>
      <ShortName>Financial instruments by categories (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>120</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>0000126 - Disclosure - Financial instruments by categories (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails5</Role>
      <ShortName>Financial instruments by categories (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>121</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>0000127 - Disclosure - Financial instruments by categories (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails6</Role>
      <ShortName>Financial instruments by categories (Details 6)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>122</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>0000128 - Disclosure - Financial instruments by categories (Details 7)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails7</Role>
      <ShortName>Financial instruments by categories (Details 7)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>123</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>0000129 - Disclosure - Financial instruments by categories (Details 8)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails8</Role>
      <ShortName>Financial instruments by categories (Details 8)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>124</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>0000130 - Disclosure - Financial instruments by categories (Details 9)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetails9</Role>
      <ShortName>Financial instruments by categories (Details 9)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>125</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R126.htm</HtmlFileName>
      <LongName>0000131 - Disclosure - Financial instruments by categories (Details Textuals 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetailsTextuals1</Role>
      <ShortName>Financial instruments by categories (Details Textuals 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>126</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R127.htm</HtmlFileName>
      <LongName>0000132 - Disclosure - Financial instruments by categories (Details Textuals 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesDetailsTextuals2</Role>
      <ShortName>Financial instruments by categories (Details Textuals 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/FinancialinstrumentsbycategoriesTables</ParentRole>
      <Position>127</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R128.htm</HtmlFileName>
      <LongName>0000134 - Disclosure - Losses per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/LossespershareDetails</Role>
      <ShortName>Losses per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/LossespershareTables</ParentRole>
      <Position>128</Position>
    </Report>
    <Report instance="stix-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R129.htm</HtmlFileName>
      <LongName>0000135 - Disclosure - Subsequent Events (Details Textuals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.semantix.ai/role/SubsequentEventsDetailsTextuals</Role>
      <ShortName>Subsequent Events (Details Textuals)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.semantix.ai/role/SubsequentEvents</ParentRole>
      <Position>129</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="20-F" original="stix-20221231.htm">stix-20221231.htm</File>
    <File>exhibit0202.htm</File>
    <File>exhibit0801.htm</File>
    <File>exhibit1201.htm</File>
    <File>exhibit1202.htm</File>
    <File>exhibit1301.htm</File>
    <File>exhibit1302.htm</File>
    <File>exhibit1501.htm</File>
    <File>stix-20221231.xsd</File>
    <File>stix-20221231_cal.xml</File>
    <File>stix-20221231_def.xml</File>
    <File>stix-20221231_lab.xml</File>
    <File>stix-20221231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>stix-20221231_g1.jpg</File>
    <File>stix-20221231_g2.jpg</File>
    <File>stix-20221231_g3.jpg</File>
    <File>stix-20221231_g4.jpg</File>
    <File>stix-20221231_g5.jpg</File>
    <File>stix-20221231_g6.jpg</File>
    <File>stix-20221231_g7.jpg</File>
    <File>stix-20221231_g8.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="47">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
    <BaseTaxonomy items="1167">https://xbrl.ifrs.org/taxonomy/2022-03-24/ifrs-full</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
