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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2020-08-04</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001626450</issuerCik>
        <issuerName>BigCommerce Holdings, Inc.</issuerName>
        <issuerTradingSymbol>BIGC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001550975</rptOwnerCik>
            <rptOwnerName>General Catalyst GP V, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001551791</rptOwnerCik>
            <rptOwnerName>General Catalyst Partners V, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR,</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001414929</rptOwnerCik>
            <rptOwnerName>General Catalyst Group V LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR,</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001549857</rptOwnerCik>
            <rptOwnerName>GC Entrepreneurs Fund V, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR,</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001414928</rptOwnerCik>
            <rptOwnerName>General Catalyst Group V Supplemental LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR,</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001774569</rptOwnerCik>
            <rptOwnerName>GC Partners Holdings, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR,</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001774568</rptOwnerCik>
            <rptOwnerName>GCGM Investment Holdings, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001337220</rptOwnerCik>
            <rptOwnerName>Fialkow David P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR,</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001337122</rptOwnerCik>
            <rptOwnerName>Cutler Joel E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GENERAL CATALYST PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>20 UNIVERSITY ROAD 4TH FLOOR,</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02138</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Series A Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3628722</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series A Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>96279</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series A Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1216279</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series B Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>610438</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series D Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>64165</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series F Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>60274</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series A Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>25388</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series B Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>71657</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series D Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5715</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series E Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>13313</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series F Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1258</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series B Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2822466</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F8"/>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series D Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>209642</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F8"/>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series E Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series 1 Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>637782</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F8"/>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each share of Series A Preferred Stock, Series B Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, and Series F Preferred Stock (a) shall automatically convert into shares of Series 1 Common Stock at the applicable conversion ratio set forth in the Issuer's certificate of incorporation immediately prior to the completion of the Issuer's initial public offering of Series 1 Common Stock and (b) has no expiration date.</footnote>
        <footnote id="F2">The reported securities are held directly by General Catalyst Group IV, L.P. General Catalyst GP IV, LLC is the general partner of General Catalyst Partners IV, L.P., which is the general partner of the General Catalyst Group IV, L.P. and GC Entrepreneurs Fund IV, L.P. Lawrence Bohn, a member of Issuer's board of directors, Joel Cutler, and David Fialkow are managing directors of General Catalyst GP IV, LLC, and, as a result, may be deemed to have voting and dispositive power over the shares held by the General Catalyst Group IV and GC Entrepreneurs Fund IV, L.P. Each of the reporting persons and entities disclaims beneficial ownership of the reported securities (except to the extent of such person's or entity's pecuniary interest in such securities).</footnote>
        <footnote id="F3">The reported securities are held directly by GC Entrepreneurs Fund IV, L.P. General Catalyst GP IV, LLC is the general partner of General Catalyst Partners IV, L.P., which is the general partner of General Catalyst Group IV, L.P. and GC Entrepreneurs Fund IV, L.P. Lawrence Bohn, a member of Issuer's board of directors, Joel Cutler, and David Fialkow are managing directors of General Catalyst GP IV, LLC, and, as a result, may be deemed to have voting and dispositive power over the shares held by General Catalyst Group IV, L.P. and GC Entrepreneurs Fund IV, L.P. Each of the reporting persons and entities disclaims beneficial ownership of the reported securities (except to the extent of such person's or entity's pecuniary interest in such securities).</footnote>
        <footnote id="F4">The reported securities are held directly by General Catalyst Group V, L.P. General Catalyst GP V, LLC is the general partner of General Catalyst Partners V, L.P., which is the general partner of General Catalyst Group V, L.P., GC Entrepreneurs Fund V, L.P. and General Catalyst Group V Supplemental, L.P. Lawrence Bohn, a member of Issuer's board of directors, Joel Cutler, and David Fialkow are managing directors of the General Catalyst GP V, LLC, and, as a result, may be deemed to have voting and dispositive power over the shares held by General Catalyst Group V, L.P., GC Entrepreneurs Fund V, L.P., and General Catalyst Group V Supplemental, L.P. GCGM Investment Holdings, L.P. is a limited partner of General Catalyst Partners V, L.P. with a pecuniary interest in the reported securities. GC Partners Holdings, L.P. is a limited partner of GCGM Investment Holdings, L.P. with a pecuniary interest in the reported securities.</footnote>
        <footnote id="F5">(Continued from Footnote 4) Each of the reporting persons and entities disclaims beneficial ownership of the reported securities (except to the extent of such person's or entity's pecuniary interest in such securities).</footnote>
        <footnote id="F6">The reported securities are held directly by GC Entrepreneurs Fund V, L.P. General Catalyst GP V, LLCis the general partner of General Catalyst Partners V, L.P., which is the general partner of General Catalyst Group V, L.P., GC Entrepreneurs Fund V, L.P. and General Catalyst Group V Supplemental, L.P. Lawrence Bohn, a member of Issuer's board of directors, Joel Cutler, and David Fialkow are managing directors of General Catalyst GP V, LLC, and, as a result, may be deemed to have voting and dispositive power over the shares held by General Catalyst Group V, L.P., GC Entrepreneurs Fund V, L.P., and General Catalyst Group V Supplemental, L.P. GCGM Investment Holdings, L.P. is a limited partner of General Catalyst Partners V, L.P. with a pecuniary interest in the reported securities. GC Partners Holdings, L.P. is a limited partner of GCGM Investment Holdings, L.P. with a pecuniary interest in the reported securities.</footnote>
        <footnote id="F7">(Continued from Footnote 6) Each of the reporting persons and entities disclaims beneficial ownership of the reported securities (except to the extent of such person's or entity's pecuniary interest in such securities).</footnote>
        <footnote id="F8">The reported securities are held directly by General Catalyst Group V Supplemental, L.P. General Catalyst GP V, LLC is the general partner of General Catalyst Partners V, L.P., which is the general partner of General Catalyst Group V, L.P., GC Entrepreneurs Fund V, L.P. and General Catalyst Group V Supplemental, L.P. Lawrence Bohn, a member of Issuer's board of directors, Joel Cutler, and David Fialkow are managing directors of the General Catalyst GP V, LLC, and, as a result, may be deemed to have voting and dispositive power over the shares held by General Catalyst Group V, L.P., GC Entrepreneurs Fund V, L.P., and General Catalyst Group V Supplemental, L.P. GCGM Investment Holdings, L.P. is a limited partner of General Catalyst Partners V, L.P. with a pecuniary interest in the reported securities. GC Partners Holdings, L.P. is a limited partner of GCGM Investment Holdings, L.P. with a pecuniary interest in the reported securities.</footnote>
        <footnote id="F9">(Continued from Footnote 8) Each of the reporting persons and entities disclaims beneficial ownership of the reported securities (except to the extent of such person's or entity's pecuniary interest in such securities).</footnote>
    </footnotes>

    <remarks>This report is one of two reports, each on a separate Form 3, but relating to the same transaction being filed by entities affiliated with General Catalyst.
Exhibit 24 - Power of Attorney.</remarks>

    <ownerSignature>
        <signatureName>General Catalyst GP V, LLC, the General Partner for General Catalyst Partners V, L.P., the General Partner for General Catalyst Group V, L.P.; By: /s/ Christopher McCain, Chief Legal Officer</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>General Catalyst Partners V, L.P. General Catalyst Partners V, L.P., Its General Partner, By: General Catalyst GP V, LLC, Its General Partner;; By: /s/ Christopher McCain, Chief Legal Officer</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>General Catalyst Group V, L.P., By: General Catalyst Partners V, L.P., Its General Partner, By: General Catalyst GP V, LLC, Its General Partner; By: /s/ Christopher McCain, Chief Legal Officer</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>GC Entrepreneurs Fund V, L.P., By: General Catalyst Partners V, L.P., Its General Partner, By: General Catalyst GP V, LLC, Its General Partner; By: /s/ Christopher McCain, Chief Legal Officer</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>General Catalyst Group V Supplemental, L.P., By: General Catalyst Partners V, L.P., its General Partner, By: General Catalyst GP V, LLC, its General Partner' By: /s/ Christopher McCain, Chief Legal Officer</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>GC Partners Holdings, L.P.; By: General Catalyst Group Management Holdings GP, LLC, its General Partner; By: /s/ Christopher McCain, Chief Legal Officer</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>GCGM Investment Holdings, L.P., By: General Catalyst Group Management Holdings GP, LLC, its General Partner; By: /s/ Christopher McCain, Chief Legal Officer</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Christopher McCain, attorney-in-fact for David Fialkow</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Christopher McCain, attorney-in-fact for Joel Cutler</signatureName>
        <signatureDate>2020-08-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
