Comparison of issue-tracking systems

Notable issue tracking systems, including bug tracking systems, help desk and service desk issue tracking systems, as well as asset management systems, include the following.The comparison includes client-server application, distributed and hosted systems.System names listed with a light purple background are no longer in active development.
issue tracking systemsbug tracking systemshelp deskservice deskasset managementLicenseApache BloodhoundApache Software FoundationApache LicensePythonPostgreSQLSQLiteApache AlluraApache License 2.0MongoDBAssemblaProprietaryopen sourceAxosoftSQL ServerAzure DevOps Server (Team Foundation Server)MicrosoftBugzillaMozilla FoundationOracleDebbugsDebianFlat fileBerkeley DBDolibarrMariaDBFaveo HelpdeskOpen Software LicenseFogBugzGlitchWindowsFreeBSDFossilFusionForgeFree Software FoundationHelix ALM (aka TestTrack)Perforce SoftwareJavaScriptHP Quality CenterHewlett-PackardMercury InteractiveAtlassianLaunchpadCanonical Ltd.MantisBTMicrosoft Dynamics CRMMicrosoft SQL ServerOpenProjectorg-modePhabricatorFacebookRedmineRequest TrackerRoundupMIT licenseStarTeamBorlandIBM Db2SupportworksSybaseSysAidNew BSDTrackerSuite.NetAutomation CentreSQL Server ExpressTrelloNode.jsTuleapTwprojectHibernateYouTrackJetBrainsKotlinZammadreportingFull-text searchIndexedEdit conflictOracle DatabaseHelix ALMConfluence (Enterprise wiki)LuceneMediaWikiDokuWikiburn down chartswizardCrystal ReportsMicrosoft Excelknowledge baseintegrated Asset ManagementTeamworkGantt chartsMobile webVisual StudioIntelliJ IDEAXMLRPCiPhoneTeam Foundation ServerTwitterMercurialBazaarMonotoneSubversionPerforceAccuRevClearCaseVault SourcegearSurround SCMHP Application Lifecycle ManagementTwo-factorOpenIDShibbolethGoogleMicrosoft 365Comparison of help desk issue tracking softwareList of personal information managersComparison of project management softwareNetworked Help DeskOSS through Javaservice level agreementJenkinsVisual SourceSafeWayback MachineSVNBridgeTeamCityGitHubFree softwareManiphestCodebergOpen-CoreGitLabAzure DevOps ServerSourceForgeGNU SavannahCodePlexBitbucket