<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>258</ContextCount>
  <ElementCount>443</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>78</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100010 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnaudited</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100020 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnauditedParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100030 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperationsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Operations (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100040 - Statement - Condensed Consolidated Statements of Comprehensive Loss (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfComprehensiveLossUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Loss (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100050 - Statement - Condensed Consolidated Statements of Stockholders' Equity (unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfStockholdersEquityUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Stockholders' Equity (unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>100060 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>100070 - Disclosure - Business and Nature of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBusinessAndNatureOfOperations</Role>
      <ShortName>Business and Nature of Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>100080 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>100090 - Disclosure - Accounts Receivable and Contract Assets, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNet</Role>
      <ShortName>Accounts Receivable and Contract Assets, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>100100 - Disclosure - Property and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentNet</Role>
      <ShortName>Property and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>100110 - Disclosure - Capitalized Software Development Costs, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsNet</Role>
      <ShortName>Capitalized Software Development Costs, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>100120 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureFairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>100130 - Disclosure - Goodwill and Intangible Assets, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNet</Role>
      <ShortName>Goodwill and Intangible Assets, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>100140 - Disclosure - Business Combinations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBusinessCombinations</Role>
      <ShortName>Business Combinations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>100150 - Disclosure - Convertible Senior Notes</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotes</Role>
      <ShortName>Convertible Senior Notes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>100160 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>100170 - Disclosure - Stock Plans and Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensation</Role>
      <ShortName>Stock Plans and Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>100180 - Disclosure - Basic and Diluted Net Loss Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShare</Role>
      <ShortName>Basic and Diluted Net Loss Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>100190 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>100200 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureSegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>100210 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureRevenueRecognition</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>100220 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureLeases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>100230 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>100240 - Disclosure - Subsequent Event</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureSubsequentEvent</Role>
      <ShortName>Subsequent Event</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>100250 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>100260 - Disclosure - Accounts Receivable and Contract Assets, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNetTables</Role>
      <ShortName>Accounts Receivable and Contract Assets, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNet</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>100270 - Disclosure - Property and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentNetTables</Role>
      <ShortName>Property and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentNet</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>100280 - Disclosure - Capitalized Software Development Costs, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsNetTables</Role>
      <ShortName>Capitalized Software Development Costs, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsNet</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>100290 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>100300 - Disclosure - Goodwill and Intangible Assets, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetTables</Role>
      <ShortName>Goodwill and Intangible Assets, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNet</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>100310 - Disclosure - Business Combinations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBusinessCombinationsTables</Role>
      <ShortName>Business Combinations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBusinessCombinations</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>100320 - Disclosure - Convertible Senior Notes (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesTables</Role>
      <ShortName>Convertible Senior Notes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotes</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>100330 - Disclosure - Stock Plans and Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationTables</Role>
      <ShortName>Stock Plans and Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensation</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>100340 - Disclosure - Basic and Diluted Net Loss Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShareTables</Role>
      <ShortName>Basic and Diluted Net Loss Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShare</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>100350 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureRevenueRecognitionTables</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureRevenueRecognition</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>100360 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureLeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.everbridge.com/20220331/taxonomy/role/DisclosureLeases</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>100370 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>100380 - Disclosure - Accounts Receivable and Contract Assets, Net - Schedule of Accounts Receivable, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNetScheduleOfAccountsReceivableNetDetails</Role>
      <ShortName>Accounts Receivable and Contract Assets, Net - Schedule of Accounts Receivable, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>100390 - Disclosure - Accounts Receivable and Contract Assets, Net - Schedule of Changes in Allowance for Credit Losses for Accounts Receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNetScheduleOfChangesInAllowanceForCreditLossesForAccountsReceivableDetails</Role>
      <ShortName>Accounts Receivable and Contract Assets, Net - Schedule of Changes in Allowance for Credit Losses for Accounts Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>100400 - Disclosure - Accounts Receivable and Contract Assets, Net - Schedule of Contract Assets, Net, Included in Deferred Costs and Other Current Assets on Consolidated Balance Sheets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNetScheduleOfContractAssetsNetIncludedInDeferredCostsAndOtherCurrentAssetsOnConsolidatedBalanceSheetsDetails</Role>
      <ShortName>Accounts Receivable and Contract Assets, Net - Schedule of Contract Assets, Net, Included in Deferred Costs and Other Current Assets on Consolidated Balance Sheets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>100410 - Disclosure - Accounts Receivable and Contract Assets, Net - Schedule of Changes in Allowance for Credit Losses for Contract Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNetScheduleOfChangesInAllowanceForCreditLossesForContractAssetsDetails</Role>
      <ShortName>Accounts Receivable and Contract Assets, Net - Schedule of Changes in Allowance for Credit Losses for Contract Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>100420 - Disclosure - Accounts Receivable and Contract Assets, Net - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNetAdditionalInformationDetails</Role>
      <ShortName>Accounts Receivable and Contract Assets, Net - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>100430 - Disclosure - Accounts Receivable and Contract Assets, Net - Schedule of Changes in Sales Reserve (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureAccountsReceivableAndContractAssetsNetScheduleOfChangesInSalesReserveDetails</Role>
      <ShortName>Accounts Receivable and Contract Assets, Net - Schedule of Changes in Sales Reserve (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>100440 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentNetScheduleOfPropertyAndEquipmentNetDetails</Role>
      <ShortName>Property and Equipment, Net - Schedule of Property and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>100450 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentNetScheduleOfPropertyAndEquipmentParentheticalDetails</Role>
      <ShortName>Property and Equipment, Net - Schedule of Property and Equipment (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>100460 - Disclosure - Property and Equipment, Net - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentNetAdditionalInformationDetails</Role>
      <ShortName>Property and Equipment, Net - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>100470 - Disclosure - Capitalized Software Development Costs, Net - Summary of Capitalized Software Development Costs, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsNetSummaryOfCapitalizedSoftwareDevelopmentCostsNetDetails</Role>
      <ShortName>Capitalized Software Development Costs, Net - Summary of Capitalized Software Development Costs, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>100480 - Disclosure - Capitalized Software Development Costs, Net - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsNetAdditionalInformationDetails</Role>
      <ShortName>Capitalized Software Development Costs, Net - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>100490 - Disclosure - Capitalized Software Development Costs, Net - Schedule of Expected Amortization of Capitalized Software Development Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsNetScheduleOfExpectedAmortizationOfCapitalizedSoftwareDevelopmentCostsDetails</Role>
      <ShortName>Capitalized Software Development Costs, Net - Schedule of Expected Amortization of Capitalized Software Development Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>100500 - Disclosure - Fair Value Measurements - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails</Role>
      <ShortName>Fair Value Measurements - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>100510 - Disclosure - Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>100520 - Disclosure - Fair Value Measurements - Summary of Changes in Level 3 Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfChangesInLevel3FinancialInstrumentsDetails</Role>
      <ShortName>Fair Value Measurements - Summary of Changes in Level 3 Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>100530 - Disclosure - Goodwill and Intangible Assets, Net - Schedule of Changes in Gross Carrying Amount of Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetScheduleOfChangesInGrossCarryingAmountOfGoodwillDetails</Role>
      <ShortName>Goodwill and Intangible Assets, Net - Schedule of Changes in Gross Carrying Amount of Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>100540 - Disclosure - Goodwill and Intangible Assets, Net - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetAdditionalInformationDetails</Role>
      <ShortName>Goodwill and Intangible Assets, Net - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>100550 - Disclosure - Goodwill and Intangible Assets, Net - Schedule of Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetScheduleOfIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Intangible Assets, Net - Schedule of Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>100560 - Disclosure - Goodwill and Intangible Assets, Net - Schedule of Expected Amortization of Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetScheduleOfExpectedAmortizationOfIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Intangible Assets, Net - Schedule of Expected Amortization of Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>100570 - Disclosure - Business Combinations - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBusinessCombinationsAdditionalInformationDetails</Role>
      <ShortName>Business Combinations - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>100580 - Disclosure - Business Combinations - Summary of Allocation of Purchase Consideration and Estimated Values of Assets Acquired and Liabilities Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBusinessCombinationsSummaryOfAllocationOfPurchaseConsiderationAndEstimatedValuesOfAssetsAcquiredAndLiabilitiesAssumedDetails</Role>
      <ShortName>Business Combinations - Summary of Allocation of Purchase Consideration and Estimated Values of Assets Acquired and Liabilities Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>100590 - Disclosure - Convertible Senior Notes - Schedule of Cumulative Effect of Changes Made to Consolidated Balance Sheet (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesScheduleOfCumulativeEffectOfChangesMadeToConsolidatedBalanceSheetDetails</Role>
      <ShortName>Convertible Senior Notes - Schedule of Cumulative Effect of Changes Made to Consolidated Balance Sheet (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>100600 - Disclosure - Convertible Senior Notes - Additional Information (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesAdditionalInformationDetails</Role>
      <ShortName>Convertible Senior Notes - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>100610 - Disclosure - Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesScheduleOfComponentsOfConvertibleSeniorNotesDetails</Role>
      <ShortName>Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>100620 - Disclosure - Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Parenthetical) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesScheduleOfComponentsOfConvertibleSeniorNotesParentheticalDetails</Role>
      <ShortName>Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>100630 - Disclosure - Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesSummaryOfTotalInterestExpenseRecognizedRelatedToConvertibleSeniorNotesDetails</Role>
      <ShortName>Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>100640 - Disclosure - Convertible Senior Notes - Summary of Fair Value and Carrying Value of Convertible Senior Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesSummaryOfFairValueAndCarryingValueOfConvertibleSeniorNotesDetails</Role>
      <ShortName>Convertible Senior Notes - Summary of Fair Value and Carrying Value of Convertible Senior Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>100650 - Disclosure - Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Parenthetical) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesSummaryOfTotalInterestExpenseRecognizedRelatedToConvertibleSeniorNotesParentheticalDetails</Role>
      <ShortName>Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>100660 - Disclosure - Convertible Senior Notes - Summary of Debt Obligations (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureConvertibleSeniorNotesSummaryOfDebtObligationsDetails</Role>
      <ShortName>Convertible Senior Notes - Summary of Debt Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>100670 - Disclosure - Stockholders' Equity - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetails</Role>
      <ShortName>Stockholders' Equity - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>100680 - Disclosure - Stock Plans and Stock-Based Compensation - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationAdditionalInformationDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>100690 - Disclosure - Stock Plans and Stock-Based Compensation - 2016 Employee Stock Purchase Plan - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensation2016EmployeeStockPurchasePlanAdditionalInformationDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - 2016 Employee Stock Purchase Plan - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>100700 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Shares Issuable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfAssumptionsUsedInDeterminingFairValueOfSharesIssuableDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Shares Issuable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>100710 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Shares Issuable (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfAssumptionsUsedInDeterminingFairValueOfSharesIssuableParentheticalDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Shares Issuable (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>100720 - Disclosure - Stock Plans and Stock-Based Compensation - Stock Options - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationStockOptionsAdditionalInformationDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Stock Options - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>100730 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfStockOptionActivityDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Schedule of Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>100740 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Stock Options Outstanding, Vested and Expected to Vest and Exercisable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfStockOptionsOutstandingVestedAndExpectedToVestAndExercisableDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Schedule of Stock Options Outstanding, Vested and Expected to Vest and Exercisable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>100750 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Vested and Nonvested Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfVestedAndNonvestedStockOptionActivityDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Schedule of Vested and Nonvested Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>100760 - Disclosure - Stock Plans and Stock-Based Compensation - Restricted Stock Units - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationRestrictedStockUnitsAdditionalInformationDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Restricted Stock Units - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>100770 - Disclosure - Stock Plans and Stock-Based Compensation - Performance-Based Restricted Stock Units - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationPerformanceBasedRestrictedStockUnitsAdditionalInformationDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Performance-Based Restricted Stock Units - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>100780 - Disclosure - Stock Plans and Stock-Based Compensation - Summary of RSU and PSU Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationSummaryOfRSUAndPSUActivityDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Summary of RSU and PSU Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>100790 - Disclosure - Stock Plans and Stock-Based Compensation - Market-Based Grants - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationMarketBasedGrantsAdditionalInformationDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Market-Based Grants - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>100800 - Disclosure - Stock Plans and Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationSummaryOfStockBasedCompensationExpenseDetails</Role>
      <ShortName>Stock Plans and Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>100810 - Disclosure - Basic and Diluted Net Loss Per Share - Schedule of Common Equivalent Shares were Excluded from Diluted Net Loss Per Share Calculation because their Inclusion would have been Anti-Dilutive (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShareScheduleOfCommonEquivalentSharesWereExcludedFromDilutedNetLossPerShareCalculationBecauseTheirInclusionWouldHaveBeenAntiDilutiveDetails</Role>
      <ShortName>Basic and Diluted Net Loss Per Share - Schedule of Common Equivalent Shares were Excluded from Diluted Net Loss Per Share Calculation because their Inclusion would have been Anti-Dilutive (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>100820 - Disclosure - Basic and Diluted Net Loss per Share - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShareAdditionalInformationDetails</Role>
      <ShortName>Basic and Diluted Net Loss per Share - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>100830 - Disclosure - Income Taxes - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails</Role>
      <ShortName>Income Taxes - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>100840 - Disclosure - Segment Information - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureSegmentInformationAdditionalInformationDetails</Role>
      <ShortName>Segment Information - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>100850 - Disclosure - Revenue Recognition - Summary of Revenues Disaggregated by Geography (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenuesDisaggregatedByGeographyDetails</Role>
      <ShortName>Revenue Recognition - Summary of Revenues Disaggregated by Geography (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>100860 - Disclosure - Revenue Recognition - Summary of Revenues Disaggregated by Revenue Source (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenuesDisaggregatedByRevenueSourceDetails</Role>
      <ShortName>Revenue Recognition - Summary of Revenues Disaggregated by Revenue Source (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>100870 - Disclosure - Revenue Recognition - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureRevenueRecognitionAdditionalInformationDetails</Role>
      <ShortName>Revenue Recognition - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>100880 - Disclosure - Revenue Recognition - Remaining Performance Obligations - Additional Information (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureRevenueRecognitionRemainingPerformanceObligationsAdditionalInformationDetails1</Role>
      <ShortName>Revenue Recognition - Remaining Performance Obligations - Additional Information (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>100890 - Disclosure - Leases - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureLeasesAdditionalInformationDetails</Role>
      <ShortName>Leases - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>100900 - Disclosure - Leases - Summary of Additional Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureLeasesSummaryOfAdditionalInformationRelatedToLeasesDetails</Role>
      <ShortName>Leases - Summary of Additional Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>100910 - Disclosure - Leases - Schedule of Maturities of Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureLeasesScheduleOfMaturitiesOfLeaseLiabilitiesDetails</Role>
      <ShortName>Leases - Schedule of Maturities of Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>100930 - Disclosure - Leases - Schedule of Components of Lease Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureLeasesScheduleOfComponentsOfLeaseExpenseDetails</Role>
      <ShortName>Leases - Schedule of Components of Lease Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="evbg-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>100940 - Disclosure - Subsequent Event - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.everbridge.com/20220331/taxonomy/role/DisclosureSubsequentEventAdditionalInformationDetails</Role>
      <ShortName>Subsequent Event - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</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="10-Q" original="evbg-10q_20220331.htm">evbg-10q_20220331.htm</File>
    <File>evbg-20220331.xsd</File>
    <File>evbg-20220331_cal.xml</File>
    <File>evbg-20220331_def.xml</File>
    <File>evbg-20220331_lab.xml</File>
    <File>evbg-20220331_pre.xml</File>
    <File>evbg-ex311_9.htm</File>
    <File>evbg-ex312_6.htm</File>
    <File>evbg-ex321_7.htm</File>
    <File>evbg-ex322_8.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="849">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
