<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001776193</cik>
        <entityName>Protean Biodiagnostics Inc.</entityName>
        <issuerAddress>
            <street1>6555 SANGER ROAD, SUITE 232</street1>
            <city>ORLANDO</city>
            <stateOrCountry>FL</stateOrCountry>
            <stateOrCountryDescription>FLORIDA</stateOrCountryDescription>
            <zipCode>32827</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>754-242-9682</issuerPhoneNumber>
        <jurisdictionOfInc>FLORIDA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Anthony</firstName>
                <middleName>Martin</middleName>
                <lastName>Magliocco</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6555 Sanger Road</street1>
                <street2>Suite 260</street2>
                <city>Orlando</city>
                <stateOrCountry>FL</stateOrCountry>
                <stateOrCountryDescription>FLORIDA</stateOrCountryDescription>
                <zipCode>32827</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Anees</firstName>
                <lastName>Chagpar</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6555 Sanger Road</street1>
                <street2>Suite 260</street2>
                <city>Orlando</city>
                <stateOrCountry>FL</stateOrCountry>
                <stateOrCountryDescription>FLORIDA</stateOrCountryDescription>
                <zipCode>32827</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ronen</firstName>
                <lastName>Israel</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6555 Sanger Road</street1>
                <street2>Suite 260</street2>
                <city>Orlando</city>
                <stateOrCountry>FL</stateOrCountry>
                <stateOrCountryDescription>FLORIDA</stateOrCountryDescription>
                <zipCode>32827</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Frank</firstName>
                <lastName>Morsani</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6555 Sanger Road</street1>
                <street2>Suite 260</street2>
                <city>Orlando</city>
                <stateOrCountry>FL</stateOrCountry>
                <stateOrCountryDescription>FLORIDA</stateOrCountryDescription>
                <zipCode>32827</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Violet</firstName>
                <lastName>Jameson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6555 Sanger Road</street1>
                <street2>Suite 260</street2>
                <city>Orlando</city>
                <stateOrCountry>FL</stateOrCountry>
                <stateOrCountryDescription>FLORIDA</stateOrCountryDescription>
                <zipCode>32827</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Susan</firstName>
                <lastName>Lee</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6555 Sanger Road</street1>
                <street2>Suite 260</street2>
                <city>Orlando</city>
                <stateOrCountry>FL</stateOrCountry>
                <stateOrCountryDescription>FLORIDA</stateOrCountryDescription>
                <zipCode>32827</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Health Care</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06b</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <yetToOccur>true</yetToOccur>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Simple Agreement for Future Equity</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>50000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Robert N. Cunjak</recipientName>
                <recipientCRDNumber>6953909</recipientCRDNumber>
                <associatedBDName>Tangent Capital Partners, LLC</associatedBDName>
                <associatedBDCRDNumber>146999</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>437 Madison Avenue</street1>
                    <street2>34th Floor</street2>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10022</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>CA</state>
                    <description>CALIFORNIA</description>
                    <state>CO</state>
                    <description>COLORADO</description>
                    <state>CT</state>
                    <description>CONNECTICUT</description>
                    <state>DC</state>
                    <description>DISTRICT OF COLUMBIA</description>
                    <state>FL</state>
                    <description>FLORIDA</description>
                    <state>IL</state>
                    <description>ILLINOIS</description>
                    <state>LA</state>
                    <description>LOUISIANA</description>
                    <state>ME</state>
                    <description>MAINE</description>
                    <state>MD</state>
                    <description>MARYLAND</description>
                    <state>MA</state>
                    <description>MASSACHUSETTS</description>
                    <state>MI</state>
                    <description>MICHIGAN</description>
                    <state>MN</state>
                    <description>MINNESOTA</description>
                    <state>NJ</state>
                    <description>NEW JERSEY</description>
                    <state>NY</state>
                    <description>NEW YORK</description>
                    <state>NC</state>
                    <description>NORTH CAROLINA</description>
                    <state>OK</state>
                    <description>OKLAHOMA</description>
                    <state>PA</state>
                    <description>PENNSYLVANIA</description>
                    <state>RI</state>
                    <description>RHODE ISLAND</description>
                    <state>SC</state>
                    <description>SOUTH CAROLINA</description>
                    <state>TX</state>
                    <description>TEXAS</description>
                    <state>VA</state>
                    <description>VIRGINIA</description>
                    <state>WV</state>
                    <description>WEST VIRGINIA</description>
                </statesOfSolicitationList>
                <foreignSolicitation>true</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>6000000</totalOfferingAmount>
            <totalAmountSold>0</totalAmountSold>
            <totalRemaining>6000000</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>true</hasNonAccreditedInvestors>
            <numberNonAccreditedInvestors>0</numberNonAccreditedInvestors>
            <totalNumberAlreadyInvested>0</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>360000</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>If offering is fully subscribed.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>250000</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse>Repayment of loan to a director.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Protean Biodiagnostics Inc.</issuerName>
                <signatureName>M. Andica Kunst</signatureName>
                <nameOfSigner>M. Andica Kunst</nameOfSigner>
                <signatureTitle>General Counsel</signatureTitle>
                <signatureDate>2023-12-07</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
