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

    <schemaVersion>X0706</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001574478</cik>
        <entityName>Insight Venture Partners VIII, L.P.</entityName>
        <issuerAddress>
            <street1>Insight Venture Associates VIII, L.P.</street1>
            <street2>309 UGLAND HOUSE</street2>
            <city>GRAND CAYMAN</city>
            <stateOrCountry>E9</stateOrCountry>
            <stateOrCountryDescription>CAYMAN ISLANDS</stateOrCountryDescription>
            <zipCode>KY1-1104</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>212-230-9200</issuerPhoneNumber>
        <jurisdictionOfInc>CAYMAN ISLANDS</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2013</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Jeffrey</firstName>
                <lastName>Horing</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>680 Fifth Avenue</street1>
                <street2>8th</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Sole Director of the General Partner of the General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Private Equity Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2013-04-11</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Warren H. Spar</recipientName>
                <recipientCRDNumber>2357369</recipientCRDNumber>
                <associatedBDName>Sparring Partners Capital LLC</associatedBDName>
                <associatedBDCRDNumber>133780</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>420 Lexington Avenue, Suite 2458</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10170</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>WA</state>
                    <description>WASHINGTON</description>
                    <state>IL</state>
                    <description>ILLINOIS</description>
                    <state>VA</state>
                    <description>VIRGINIA</description>
                    <state>NY</state>
                    <description>NEW YORK</description>
                    <state>TX</state>
                    <description>TEXAS</description>
                    <state>FL</state>
                    <description>FLORIDA</description>
                    <state>CA</state>
                    <description>CALIFORNIA</description>
                    <state>PA</state>
                    <description>PENNSYLVANIA</description>
                    <state>MD</state>
                    <description>MARYLAND</description>
                    <state>OR</state>
                    <description>OREGON</description>
                    <state>MA</state>
                    <description>MASSACHUSETTS</description>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
            <recipient>
                <recipientName>David Choi</recipientName>
                <recipientCRDNumber>2277222</recipientCRDNumber>
                <associatedBDName>Sparring Partners Capital LLC</associatedBDName>
                <associatedBDCRDNumber>133780</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>420 Lexington Avenue, Suite 2458</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10170</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>WA</state>
                    <description>WASHINGTON</description>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>2400000000</totalOfferingAmount>
            <totalAmountSold>1493500000</totalAmountSold>
            <totalRemaining>906500000</totalRemaining>
            <clarificationOfResponse>The Total Offering Amount and the Total Remaining to be Sold include amounts to be sold by the Issuer's parallel funds.  The Total Amount Sold includes amounts listed in the Form D's for the parallel funds.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>33</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>1350000</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>The commission estimate is the maximum total amount agreed by the parties to be paid in connection with sales of interests in this Issuer and for two parallel funds if specified amounts are invested.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Insight Venture Partners VIII, L.P.</issuerName>
                <signatureName>Jeffrey Horing</signatureName>
                <nameOfSigner>Jeffrey Horing</nameOfSigner>
                <signatureTitle>See Clarification Box in Item #3 Above</signatureTitle>
                <signatureDate>2013-04-24</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
