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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-12-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001739942</issuerCik>
        <issuerName>SolarWinds Corp</issuerName>
        <issuerTradingSymbol>SWI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001552054</rptOwnerCik>
            <rptOwnerName>Silver Lake Partners IV, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SILVER LAKE</rptOwnerStreet1>
            <rptOwnerStreet2>2775 SAND HILL ROAD, SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-12-18</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>199650</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>86676812</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>160347</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">In connection with the December 18, 2020 closing of the previously reported sale of securities under a Stock Purchase Agreement dated December 7, 2020, and as previously described in a Form 4 filed by the Reporting Person on December 9, 2020, Silver Lake Partners IV, L.P. (&quot;SLP IV&quot;) distributed shares of Common Stock to its general partner, Silver Lake Technology Associates IV, L.P. (&quot;SLTA IV&quot;), which now directly holds such shares and expects at a future date to further distribute such shares to certain direct and indirect partners of SLTA IV, for the sole purpose of charitable giving.</footnote>
        <footnote id="F2">These securities are directly held by SLP IV. The general partner of SLP IV is SLTA IV, and the general partner of SLTA IV is SLTA IV (GP), L.L.C. (&quot;SLTA IV GP&quot;). Silver Lake Group, L.L.C. (&quot;SLG&quot;) is the managing member of SLTA IV GP.</footnote>
        <footnote id="F3">Messrs. Kenneth Y. Hao, Michael J. Bingle and Michael Widmann serve as directors of the Issuer and are executives of SLG. Each of SLP IV and certain of its affiliates may be deemed to be a director by deputization of the Issuer. This filing shall not be deemed an admission that for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the &quot;Exchange Act&quot;), or otherwise, that the Reporting Person is the beneficial owner of any equity securities in excess of its pecuniary interests, and the Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.</footnote>
        <footnote id="F4">Represents restricted stock units or shares of Common Stock held by Kenneth Y. Hao, Michael J. Bingle and Michael Widmann, directors of the Issuer and executives of SLG, and Jason White, a former director of the Issuer
and an executive of SLG, as part of the Issuer's non-employee director compensation policy, for the benefit of the Reporting Person and/or certain of its affiliates or certain of the funds they manage (&quot;Silver Lake&quot;). Pursuant to Silver Lake's policies with respect to director compensation, upon the sale of these securities, the proceeds from each sale will be expected to be remitted to Silver Lake and/or its limited partners.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: /s/ Andrew J. Schader; Andrew J. Schader, Managing Director and General Counsel of Silver Lake Group, L.L.C., managing member of SLTA IV (GP), L.L.C., GP of Silver Lake Technology Associates IV, L.P., GP of Silver Lake Partners IV, L.P.</signatureName>
        <signatureDate>2020-12-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
