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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-11-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001374684</issuerCik>
        <issuerName>MULESOFT, INC</issuerName>
        <issuerTradingSymbol>MULE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001125174</rptOwnerCik>
            <rptOwnerName>HUMMER WINBLAD VENTURE PARTNERS V LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PIER 33 SOUTH</rptOwnerStreet1>
            <rptOwnerStreet2>THE EMBARCADERO, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001367004</rptOwnerCik>
            <rptOwnerName>Hummer Winblad Equity Partners V, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PIER 33 SOUTH</rptOwnerStreet1>
            <rptOwnerStreet2>THE EMBARCADERO, SUIT 300</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001367002</rptOwnerCik>
            <rptOwnerName>Hummer John</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PIER 33 SOUTH</rptOwnerStreet1>
            <rptOwnerStreet2>THE EMBARCADERO, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001228836</rptOwnerCik>
            <rptOwnerName>KERTZMAN MITCHELL</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PIER 33 SOUTH</rptOwnerStreet1>
            <rptOwnerStreet2>THE EMBARCADERO, SUIT 300</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-11-27</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1753180</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11579757</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-11-27</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F4"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>131744</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>339653</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F5"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents a pro-rata, in-kind distribution by Hummer Winblad Venture Partners V, L.P. (&quot;HWVP V&quot;) without additional consideration, to its partners. HWVP V distributed an aggregate of 1,301,743 shares to its limited partners on a pro rata basis and 451,437 shares to its general partner, Hummer Winblad Equity Partners V, L.L.C. (&quot;HW Equity V&quot;). HW Equity V subsequently distributed 451,437 shares on a pro rata basis for no additional consideration to its members and assignees.</footnote>
        <footnote id="F2">Consists of 11,570,987 shares held of record by HWVP V for itself and 8,770 shares held of record by HWVP V as nominee for Hummer Winblad Venture Partners V-A, L.P.</footnote>
        <footnote id="F3">HW Equity V is the general partner of HWVP V. John Hummer, Mitchell Kertzman and Ann Winblad are the managing members of HW Equity V and share voting and dispositive power with respect to the shares held of record by HWVP V. HW Equity V, Mr. Hummer, Mr. Kertzman and Ms. Winblad disclaim beneficial ownership of  such shares except the extent of their pecuniary interests therein.</footnote>
        <footnote id="F4">Represents a change in the form of ownership as a result of a pro-rata, in-kind distribution by HWVP V to HW Equity V and the subsequent pro-rata, in-kind
distribution by HW Equity V to its members and assignees, including Mr. Hummer and Mr. Kertzman.</footnote>
        <footnote id="F5">Consists of 227,671 shares held directly by Mr. Hummer and 111,982 shares held directly by Mr. Kertzman.</footnote>
    </footnotes>

    <remarks>This Form 4 is one of two Form 4s filed on the date hereof in respect of these shares. The Reporting Person on the other Form 4 is Ann Winblad.</remarks>

    <ownerSignature>
        <signatureName>HUMMER WINBLAD VENTURE PARTNERS V, L.P., By: Hummer Winblad Equity Partners V, L.L.C., its General Partner, By: /s/ Ingrid Chiavacci, attorney-in-fact</signatureName>
        <signatureDate>2017-11-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Hummer Winblad Equity Partners V, LLC, By: /s/ Ingrid Chiavacci, attorney-in-fact</signatureName>
        <signatureDate>2017-11-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>John Hummer, By: /s/ Ingrid Chiavacci, attorney-in-fact</signatureName>
        <signatureDate>2017-11-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Mitchell Kertzman, By: /s/ Ingrid Chiavacci, attorney-in-fact</signatureName>
        <signatureDate>2017-11-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
