<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-09-08</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001035656</issuerCik><issuerName>PLUMTREE SOFTWARE INC</issuerName>        <issuerTradingSymbol>PLUM</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001193769</rptOwnerCik><rptOwnerName>BORRMANN ERIC</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>500 SANSOME STREET</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>SAN FRANCISCO</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>94111</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Chief Financial Officer</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-09-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>4732</value><footnoteId id="F1" /></transactionShares><transactionPricePerShare><value>4</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>54418</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-09-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>1183</value></transactionShares><transactionPricePerShare><value>4.01</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>53235</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">These shares are sold pursuant to a Rule 10b5-1 Plan.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Diohonne Beltramo, Attorney-in-Fact</signatureName><signatureDate>2003-09-08</signatureDate></ownerSignature></ownershipDocument>

