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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2022-09-26</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001280058</issuerCik>
        <issuerName>BLACKBAUD INC</issuerName>
        <issuerTradingSymbol>BLKB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001688282</rptOwnerCik>
            <rptOwnerName>CLEARLAKE CAPITAL GROUP, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>233 WILSHIRE BOULEVARD, SUITE 800</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SANTA MONICA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90401</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001323912</rptOwnerCik>
            <rptOwnerName>Feliciano Jose Enrique</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CLEARLAKE CAPITAL GROUP, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>233 WILSHIRE BLVD, SUITE 800</rptOwnerStreet2>
            <rptOwnerCity>SANTA MONICA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90401</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001409564</rptOwnerCik>
            <rptOwnerName>Eghbali Behdad</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CLEARLAKE CAPITAL GROUP, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>233 WILSHIRE BLVD, SUITE 800</rptOwnerStreet2>
            <rptOwnerCity>SANTA MONICA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90401</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9751837</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares held for the account of Clearlake Capital Partners VI Finance, L.P. (&quot;Clearlake Capital Partners VI&quot;). Clearlake Capital Group, L.P. serves as the investment adviser to Clearlake Capital Partners VI. Jose Enrique Feliciano and Behdad Eghbali are Managing Partners of Clearlake Capital Group, L.P. Each of Clearlake Capital Group, L.P., Mr. Feliciano and Mr. Eghbali disclaims beneficial ownership of such securities, except to the extent of its/his indirect pecuniary interest therein.</footnote>
    </footnotes>

    <remarks>Exhibit List: Exhibit 24 - Power of Attorney of Reporting Persons (incorporated by reference to the Power of Attorney filed as Exhibit No. 2 to the Schedule 13G filed by the Reporting Persons on February 8, 2021).</remarks>

    <ownerSignature>
        <signatureName>/s/ Clearlake Capital Group, L.P., By: John Cannon, as Attorney-in-Fact</signatureName>
        <signatureDate>2022-10-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ John Cannon, Attorney-in-Fact for Jose Enrique Feliciano</signatureName>
        <signatureDate>2022-10-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ John Cannon, Attorney-in-Fact for Behdad Eghbali</signatureName>
        <signatureDate>2022-10-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
