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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-12-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001634641</rptOwnerCik>
            <rptOwnerName>THOMA BRAVO SPECIAL OPPORTUNITIES FUND II, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THOMA BRAVO, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>150 N. RIVERSIDE PLAZA, SUITE 2800</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60606</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001634649</rptOwnerCik>
            <rptOwnerName>THOMA BRAVO SPECIAL OPPORTUNITIES FUND II-A, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THOMA BRAVO, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>150 N. RIVERSIDE PLAZA, SUITE 2800</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60606</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-12-07</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5839157</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>21.97</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>100181291</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Consists of 1,903,990 shares held directly by Thoma Bravo Fund XI, L.P. (&quot;TB Fund XI&quot;), 956,231 shares held directly by Thoma Bravo Fund XI-A, L.P. (&quot;TB Fund XI-A&quot;), 42,004 shares held directly by Thoma Bravo Executive Fund XI, L.P. (&quot;TB Exec Fund XI&quot;), 941,857 shares held directly by Thoma Bravo Fund XII, L.P. (&quot;TB Fund XII&quot;), 832,953 shares held directly by Thoma Bravo Fund XII-A, L.P. (&quot;TB Fund XII-A&quot;), 9,217 shares held directly by Thoma Bravo Executive Fund XII, L.P. (&quot;TB Exec Fund XII&quot;), 8,190 shares held directly by Thoma Bravo Executive Fund XII-A, L.P. (&quot;TB Exec Fund XII-A&quot;), 770,611 shares held directly by Thoma Bravo Special Opportunities Fund II, L.P. (&quot;TB SOF II&quot;) and 374,104 shares held directly by Thoma Bravo Special Opportunities Fund II-A, L.P. (&quot;TB SOF II-A&quot;).</footnote>
        <footnote id="F2">On December 7, 2020, each of the foregoing reporting persons entered in a Stock Purchase Agreement to sell shares of common stock at a price of $21.97 per share, subject to potential adjustment under certain circumstances.</footnote>
        <footnote id="F3">Consists of 32,666,403 shares held directly by TB Fund XI, 16,405,874 shares held directly by TB Fund XI-A, 720,652 shares held directly by TB Exec Fund XI, 16,159,250 shares held directly by TB Fund XII, 14,290,803 shares held directly by TB Fund XII-A, 158,141 shares held directly by TB Exec Fund XII, 140,521 shares held directly by TB Exec Fund XII-A, 13,221,214 shares held directly by TB SOF II and  6,418,433 shares held directly by TB SOF II-A.</footnote>
        <footnote id="F4">Thoma Bravo Partners XI, L.P. (&quot;TB Partners XI&quot;) is the general partner of each of TB Fund XI, TB Fund XI-A, TB Exec Fund XI, TB SOF II and TB SOF II-A. Thoma Bravo Partners XII, L.P. (&quot;TB Partners XII&quot;) is the general partner of each of TB Fund XII, TB Fund XII-A, TB Exec Fund XII and TB Exec Fund XII-A. Thoma Bravo UGP, LLC (&quot;TB UGP&quot;) is the ultimate managing member of each of TB Partners XI and TB Partners XII.</footnote>
        <footnote id="F5">(continued from footnote 4) By virtue of the relationships described in this footnote, TB UGP may be deemed to exercise voting and dispositive power with respect to the shares held by TB Fund XI, TB Fund XI-A, TB Exec Fund XI, TB Fund XII, TB Fund XII-A, TB Exec Fund XII, TB Exec Fund XII-A, TB SOF II and TB SOF II-A. Each of TB Partners XI, TB Partners XII and TB UGP disclaims beneficial ownership of the shares owned by TB Fund XI, TB Fund XI-A, TB Exec Fund XI, TB Fund XII, TB Fund XII-A, TB Exec Fund XII, TB Exec Fund XII-A, TB SOF II and TB SOF II-A except to the extent of its pecuniary interest therein.</footnote>
    </footnotes>

    <remarks>The Reporting Persons are jointly filing this Form 4 pursuant to Rule 16a-3(j) under the Exchange Act. Because no more than 10 reporting persons can file any one Form 4 through the Securities and Exchange Commission's EDGAR system, TB Fund XI, TB Fund XI-A, TB Exec Fund XI, TB Fund XII, TB Fund XII-A, TB Exec Fund XII, TB Exec Fund XII-A, TB Partners XI, TB Partners XII and TB UGP have filed a separate Form 4. The holdings of such entities are also reported on this Form 4.</remarks>

    <ownerSignature>
        <signatureName>Thoma Bravo Special Opportunities Fund II, L.P. by /s/ Bradley Reed, Attorney-in-Fact</signatureName>
        <signatureDate>2020-12-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Thoma Bravo Special Opportunities Fund II-A, L.P. by /s/ Bradley Reed, Attorney-in-Fact</signatureName>
        <signatureDate>2020-12-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
