Comparison of issue-tracking systems

This article is a comparison of issue tracking systems that are notable, including bug tracking systems, help desk and service desk issue tracking systems, as well as asset management systems. The comparison includes client-server application, distributed and hosted systems.

General
System Creator License Implementation language(s) Back end Launch date Refs
Apache Bloodhound Apache Software Foundation Apache License Python MySQL, PostgreSQL, SQLite 2012 [1]
Assembla Tickets Assembla Proprietary, hosted. Available for free for open source projects Ruby MySQL 2008
Axosoft Axosoft LLC Proprietary, Saas C#, .NET SQL Server 2002
Bugzilla Mozilla Foundation MPL Perl MySQL, Oracle, PostgreSQL, SQLite 1998-09-19
Debbugs Debian GPL Perl Flat file, Berkeley DB indexes Between 1994 and 1999[notes 1]
Faveo Helpdesk Ladybird Web Solution Open Software License PHP MySQL 2015
FogBugz Glitch Saas ASP on Windows, PHP on macOS, FreeBSD, and Linux SQL Server, MySQL 2000 [2]
Fossil D. Richard Hipp BSD C SQLite 2006
FusionForge Various (open source contributors) GPLv2 PHP PostgreSQL 2009-02
GLPI INDEPNET GPLv2 PHP MySQL 2003-11-17
GNATS Free Software Foundation GPL C, Web Front-end In Perl Text files with custom daemon/search engine 1992
HP Quality Center Hewlett-Packard, formerly Mercury Interactive Proprietary .NET (client), Java (server) Oracle, SQL Server 1995
Jira Atlassian Proprietary. Free community licenses for open source and academic projects Java MySQL, PostgreSQL, Oracle, SQL Server 2002
Launchpad Canonical Ltd. AGPL JavaScript, Python PostgreSQL 2004-01
MantisBT Various (open source contributors) GPL PHP ADOdb (MySQL, PostgreSQL, SQL Server, etc.) 2000
Microsoft Dynamics CRM Microsoft Proprietary, Commercial .NET Microsoft SQL Server 2003
OpenProject OpenProject Foundation e.V. GPL Ruby, JavaScript MySQL, PostgreSQL, MariaDB 2010
org-mode Carsten Dominik GPL Emacs Flat file 2003
OTRS OTRS AGPL Perl, JavaScript MySQL, PostgreSQL, Oracle, SQL Server 2002
Phabricator Facebook Apache License PHP 2010
Pivotal Tracker Pivotal Labs Proprietary, free version for public projects, non-profits and academic institutions Ruby Ruby on Rails, MySQL, Memcached 2008
Redmine Jean-Philippe Lang GPLv2 Ruby MySQL, PostgreSQL, SQLite 2006
Request Tracker Best Practical Solutions, LLC GPLv2 Perl MySQL, PostgreSQL, Oracle, SQLite 1999-10-13
Roundup Ka-Ping Yee, Richard Jones MIT license (ZPL v 2.0 for the template system) Python SQLite, MySQL, PostgreSQL, Berkeley DB 2001
StarTeam originally Starbase Corporation, currently Borland Proprietary C++, Java, etc. SQL Server recommended, Oracle, DB2 supported Un­known
Supportworks Hornbill Systems Proprietary C++ and PHP SQL Server, MySQL, Oracle, Sybase 1994[3]
SysAid SysAid Technologies Proprietary C#, Java Derby, Microsoft SQL Server, MySQL, Oracle 2002
Team Foundation Server Microsoft Proprietary, Commercial .NET MS SQL Server 2005 & 2008 2005
TestTrack Seapine Software Proprietary C++, Qt4, JavaScript Oracle, PostgreSQL, SQL Server, SQLite 1996
Trac Edgewall Software New BSD Python SQLite, PostgreSQL, MySQL 2006-10-01
TrackerSuite.Net Automation Centre Proprietary C# SQL Server, SQL Server Express 2006
Trello Atlassian Saas Node.js MongoDB 2011
Tuleap enalean GPLv2 php LAMP, MySQL 2011
Twproject Open Lab Proprietary, some parts LGPL Java all relational (uses Hibernate) 2003
Wrike Wrike, Inc. Proprietary, hosted Java PostgreSQL 2006
YouTrack JetBrains s.r.o. Proprietary, stand-alone and hosted, free version, free for open source projects Java JavaScript and Kotlin 2009
Zammad Zammad GmbH AGPL Ruby MySQL, PostgreSQL 2016[4]
System Creator License Implementation language(s) Back end Launch date Refs

Features
System Documentation integration/generation, reporting Test planning integration Customizable workflow Unicode support Custom fields SLA[5] Plugin API[6] Multiple projects Full-text search Indexed full-text search Indexed file search Edit conflict warning
Apache Bloodhound Yes, integrated wiki Yes Yes Yes Yes No Yes Yes (as of 0.6) Yes Yes[7] uses Whoosh No No
Assembla Tickets Yes, Wiki syntax, email notification, linking to Subversion commits, document manager, charts, reports, notifications Yes Yes Yes Yes No Yes Yes No Un­known No No
Axosoft Yes, Team Wiki, Burndown, GitHub and TortoiseSVN integration, dashboards, custom reports for OnPremises, e-mail notifications and alerts, customer portal, RSS No Yes Yes Yes Yes Yes Yes No
Bugzilla Yes, reporting: integrated reports and charts, scheduled reports by mail Yes[8] Yes Yes Yes No Yes Yes Yes[9] Yes When using MySQL MyISAM[10] or Oracle Database[11] but not PostgreSQL[12] Yes[13]
Debbugs No No No Yes No No No Un­known No No
Faveo Helpdesk Yes, Integrated Social Media, In-built Knowledge Base and Reporting No Yes Yes Yes Yes Yes N/A Yes No No No
FogBugz Yes, Integrated wiki No Yes Yes Yes No Yes[14] Yes Yes[15] Yes[16] No[17] Yes
Fossil Yes, Integrated Wiki in addition to integrated versioned project documentation via web ui. No No No Yes No No Yes[18] No[19] No No
FusionForge Yes, integrated Mediawiki, discussion forums, news blogs, email integration, export to CSV, reporting graphs No Yes Yes Yes No Yes Yes Yes No
GLPI Yes, Contains a proprietary knowledge base of sorts Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No
GNATS No No No No No No No Un­known No
HP Quality Center Yes Yes Yes No Yes No Yes Yes No No No No
Jira Yes, Dashboard with reporting widgets (Open Social) Excel, Word, customizable charts, Confluence (Enterprise wiki) Yes[20] Yes Yes Yes Yes Yes[21] Yes Yes[22] Yes Uses Lucene[22] Optional[23] No[24]
Launchpad Yes Un­known Un­known Un­known Un­known Un­known Un­known Un­known Un­known Un­known Un­known No
MantisBT Yes, Integration of MediaWiki, DokuWiki, XWiki No Yes Yes Yes No Yes Yes Yes[25] Yes No[26] Yes
Microsoft Dynamics CRM Yes, reporting: integrated charts and reports, export to Excel, Mail Merge No Yes Yes Yes No Yes Un­known No
org-mode Yes, org-mode has built-in export to HTML, Latex, .md and literate programming capabilities for multiple languages in a single document No Yes Yes Yes No No Yes Yes No
OTRS Yes, Advanced reporting, configurable dashboards No Yes Yes Yes Yes Yes Yes Yes Yes No No
Phabricator Yes, integrated wiki and limited burn down charts Yes No Yes Yes No Yes Yes Yes Yes Yes No
Pivotal Tracker Yes, real time collaborative story backlog, integrated reports, email notification Yes No Yes No No Yes Yes No
Redmine Yes, integrated wiki, discussion forums, news blogs, email integration, calendars, Gantt Charts, RSS, export to PDF, export to Excel/CSV Yes[27] Yes Yes Yes Optional[28] Yes Yes Yes[29] Optional, when using PostgreSQL[30] Optional[31] Yes[32]
Request Tracker Yes, MediaWiki[33] No Yes Yes Yes Yes[34] Yes[35] Yes Yes[36] Yes[36] No
Roundup Yes, wiki can be integrated or linked No Yes Yes Yes No Yes[37] Yes Yes[38] Yes with issues[39] Yes No
StarTeam No Yes[40] Yes No Yes No No Un­known No
Supportworks Yes - Integrated reporting wizard, customizable PHP reporting tool, dashboard, optional interface with Crystal Reports, export to Microsoft Excel/CSV, knowledge base, optional asset management tool No Yes No Yes Yes Yes[41] Un­known No
SysAid Yes - LDAP/Email/Calendar integration, integrated Asset Management, integrated reporting, SSO, custom fields, export to CSV/PDF, KB No Yes Yes Yes Yes Yes Yes Yes Un­known No No
Team Foundation Server Yes - workflow definitions, process documentation Yes Yes Yes Yes No Yes Yes No
Teamwork Yes Yes Yes Yes Yes Yes No Yes Yes[42] Yes Uses Lucene No
TestTrack Yes - Advanced reporting, integrated charts, export to Excel, workflow with triggers Yes Yes Yes Yes No Yes Yes Yes Yes No
Trac Yes, integrated wiki Yes[43] Yes Yes Yes No Yes[44] Yes[45] Yes No[46] Yes[47]
TrackerSuite.Net Yes. Dashboards. Graphical reports. Integration with Crystal Reports. Reports can be exported to Microsoft Excel. Yes Yes Yes Yes No Yes Yes Yes No No No
Tuleap Yes, Kanban boards, Scrum planning and burndown charts, pies, Gantt, barrs, cardwall, Document Manager with approval workflow and fine grained permissions, wikis Yes Yes Yes Yes Yes Yes Yes Yes with plugin fulltext Yes with plugin fulltext No No
Wrike Yes, real-time customized reports, export to Excel, scheduled reports by mail, alerts, discussions, Gantt charts, No Yes Yes Yes No Yes Yes Un­known Yes
YouTrack Yes: Wiki syntax, custom workflow, custom issue attributes, notifications (email, jabber, RSS, etc.), email integration, reports, export to HTML and CSV, integration with VCSs. Yes[48] Yes Yes Yes Yes[49] Yes[50] Yes Yes[51] Yes (Uses Lucene) No
Zammad Yes: Documentation integration/generation, reporting: integrated knowledge base, dashboard No No Yes Yes Yes[52] Yes Yes Yes[53] Yes Yes Yes[54]
System Dynamic documentation integration/generation Test planning integration Customizable workflow Unicode support Custom fields SLA[5] Plugin API[6] Multiple projects Full-text search Indexed full-text search Indexed file search Edit conflict warning

Input interfaces


System Web Mobile web Email CLI GUI REST SOAP Mylyn[55] Visual Studio IntelliJ IDEA Others
Apache Bloodhound Yes No Optional[56][57] No No No No Yes No No Yes XMLRPC
Assembla Tickets Yes No Yes Yes No Yes No Yes No Yes No
Axosoft Yes No Yes No Yes Yes Yes No No No Yes - iPhone
Bugzilla Yes No Yes Yes Yes Yes Yes Yes No[58] Yes Yes XMLRPC[59]
Debbugs No No Yes Yes No No No No No No No
Faveo Helpdesk Yes No Yes No No Yes No No No No Yes - Android App iOS App
FogBugz Yes No Yes Yes No Yes No Yes No Yes Yes XML
Fossil Yes No No Yes No No No No No No No
FusionForge Yes No No No No No Yes No No No No
GLPI Yes No Yes No No Yes No No No No No
GNATS Yes No Yes Yes Yes No No No No No No
HP Quality Center Yes No No No Yes[60] Yes No Yes[61] No[58] Yes, via plugin Yes]
Jira Yes Yes[62] Yes Yes[63] Yes Yes Yes Yes No[58] Yes Yes - Android App, iPhone App
Launchpad Yes No Yes No No Yes No No No No Yes - Python[64]
MantisBT Yes No Yes No No No Yes Yes No Yes Yes - Android App
Microsoft Dynamics CRM Yes No Yes No No No Yes No No No No
org-mode No No No Yes No No No No No No No
OTRS Yes No Yes No No Yes Yes No No No No
Phabricator Yes No Yes Yes Yes Yes No No No Yes, via plugin No
Pivotal Tracker Yes No Yes Yes Yes Yes No No No Yes Yes - XML, iOS App
Redmine Yes Yes[65] Yes Partial [notes 2] No Yes No Yes No Yes Yes - Android App, iOS App
Request Tracker Yes No Yes Yes No Yes[66] No No No No No
Roundup Yes No Yes Yes No No No No No No Yes XMLRPC[67]
StarTeam Yes No No No Yes No No No Yes No No
Supportworks Yes No Yes No Yes Yes[68] No No No No No
SysAid Yes No Yes No Yes Yes Yes No No No No
Team Foundation Server Yes No Yes Yes No No Yes Yes No Yes, via plugin No
TestTrack Yes No Yes No Yes No Yes No No No Yes - XML, Eclipse
Trac Yes No[69] Optional[56] No No No No Yes No Yes Yes XMLRPC
TrackerSuite.Net Yes No Yes No No No No No No No No
Trello Yes Yes Yes No No Yes No No No Yes No
Tuleap Yes No Yes Yes No Yes Yes Yes No No No
Twproject Yes No Yes No No No No No No No No
Wrike Yes No No No No No No No No Yes, via plugin No
YouTrack Yes Yes[70] Yes No Yes Yes No Yes[71] No Yes No
Zammad Yes No Yes Yes No Yes No No No No No
System Web Mobile Web Email CLI GUI REST SOAP Mylyn[55] Visual Studio IntelliJ IDEA Others

Notification interfaces


System Email RSS Atom XMPP Twitter
Apache Bloodhound Yes Yes No No No
Assembla Tickets Yes Yes No No Yes
Axosoft Yes Yes No No No
Bugzilla Yes Yes Yes No No
Debbugs Yes No No No No
Faveo Helpdesk Yes No No No No
FogBugz Yes Yes No No No
Fossil Yes Yes No No No
FusionForge Yes Yes No No No
GLPI Yes No No Yes No
GNATS Yes No No No No
HP Quality Center Yes No No No No
Jira Yes Yes No Yes No
MantisBT Yes Yes No No Yes
Microsoft Dynamics CRM Yes No No No No
org-mode No No No No No
OTRS Yes No No No No
Phabricator Yes No No No No
Pivotal Tracker Yes Yes Yes No Yes
Redmine Yes Yes Yes Yes, via plugin Yes
Request Tracker Yes Yes[72] No No No
Roundup Yes Yes[73] Yes[73] No No
StarTeam Yes No No No No
Supportworks Yes No No No No
SysAid Yes No No No No
Team Foundation Server Yes No No No No
TestTrack Yes Yes No No No
Trac Yes Yes No No No
TrackerSuite.Net Yes No No No No
Twproject Yes Yes No No Yes
Wrike Yes No No No No
YouTrack Yes Yes No Yes No
Zammad Yes No No No Yes
System Email RSS Atom XMPP Twitter

Revision control system integration


System Git Mercurial Bazaar Monotone Darcs CVS Subversion Perforce AccuRev ClearCase Others
Apache Bloodhound Yes Yes Yes Yes Yes Yes Yes Optional[74] Yes No No
Assembla Tickets Yes Yes No No No No Yes Yes No No No
Axosoft Yes Yes[75] No No No No Yes Yes No No Yes VSS, Vault Sourcegear
Bugzilla Yes[76] Yes[77] Yes No No Yes Yes Yes Yes No No
Debbugs No No No No No No No No No No No
Faveo Helpdesk No No No No No No No No No No No
FogBugz Yes Yes No No No Yes Yes Yes No No 2[78]
Fossil No No No No No No No No Yes No 1[79]
FusionForge Yes Yes Yes No No Yes Yes No No No No
GNATS No No No No No Yes No No No No No
HP Application Lifecycle Management No No No No No Yes Yes Yes[80] Yes No No
Jira Yes Yes No No No Yes Yes Yes Yes[81] No[82] Yes[83]
MantisBT Yes Yes[84] No No No Yes Yes No No No No
Microsoft Dynamics CRM No No No No No No No No No No No
org-mode No No No No No No No No No No No
OTRS No No No No No No No No No No No
Phabricator Yes Yes No No No No Yes No No No No
Pivotal Tracker Yes No No No No Yes Yes No No No No
Redmine Yes Yes Yes No Yes Yes Yes Yes[80] No No No
Request Tracker No No No No No Yes Yes No No No No
Roundup No No No No Yes No Yes No No No No
StarTeam No No No No No No No No No No Yes - StarTeam includes revision control
Supportworks No No No No No No No No No No No
SysAid No No No No No No Yes No No No No
Team Foundation Server Yes[85] No Yes[86] No No No Yes[87] No No No Yes - TFS includes revision control
TestTrack Yes No No No No Yes Yes Yes No No Yes - Surround SCM, VSS
Trac Yes Yes Yes Yes Yes No Yes Optional[74] Yes No No
TrackerSuite.Net No No No No No No No No No No No
Tuleap Yes No No No No Yes Yes No No No No
Twproject No No No No No No Yes No No No No
Wrike No No No No No No Yes No No No No
YouTrack Yes[88] Yes[88] No No No Yes[88] Yes[88] Yes[88] No Yes[88] 3[88][89]
Zammad No No No No No No No No No No No
System Git Mercurial Bazaar Monotone Darcs CVS Subversion Perforce AccuRev ClearCase Others

Authentication methods


System Form based Public key cryptography Two-factor OpenID OAuth LDAP Shibboleth Others
Apache Bloodhound Yes Optional[90] No Optional[91] No Yes Un­known No
Assembla Tickets Yes No No Yes Yes Yes (private version) Un­known Un­known
Axosoft Yes No No No No Yes No No
Bugzilla Yes No No Optional[92] No Yes Un­known No
Debbugs No No No No No No No No
Faveo Helpdesk Yes No No No Yes Yes No No
FogBugz Yes Un­known Un­known Un­known Un­known Yes Un­known Un­known
Fossil Un­known Un­known Un­known Un­known Un­known No Un­known Un­known
FusionForge Yes No No Yes No Yes No Yes, CAS
GLPI Yes No Yes No No Yes No No
GNATS Un­known Un­known Un­known Un­known Un­known No Un­known Un­known
HP Quality Center No No No No No Yes No Un­known
Jira Yes No No Yes Yes Yes Yes, via plugin[93][94] Yes, via Crowd[95]
MantisBT Yes No No Yes[96] Yes[97] Yes Un­known No
Microsoft Dynamics CRM Un­known Un­known Un­known Un­known Un­known Yes Un­known Un­known
org-mode Un­known Un­known Un­known Un­known Un­known No Un­known Un­known
OTRS Yes Yes Yes Un­known Un­known Yes Un­known Un­known
Phabricator Yes No Yes No Yes Yes No No
Pivotal Tracker Yes No No Yes, Google Account No No No No
Redmine Yes Yes[98] No Yes[99] No Yes Yes, via Apache (using mod_rails) No
Request Tracker Yes Un­known Un­known Yes[100] Un­known Yes[101] Un­known Yes[102]
Roundup Yes Un­known Un­known Yes[103] Un­known Yes Yes[104] Yes[105]
StarTeam Un­known Un­known Un­known Un­known Un­known No Un­known Un­known
Supportworks Un­known Un­known Un­known Un­known Un­known Yes Un­known Un­known
SysAid Yes No No No No Yes No Yes, CAS
Team Foundation Server Un­known Un­known Un­known Un­known Un­known Yes Un­known Un­known
TestTrack Yes Optional No No No Yes No Yes - custom DLL
Trac Yes Optional[90] No Optional[91] No Yes Un­known No
TrackerSuite.Net Yes No No No No Yes No No
Tuleap Yes No No Yes Yes Yes No No
Twproject Yes Un­known Un­known Un­known Un­known Yes Un­known Yes, Simple container auth.
Wrike Un­known Un­known Un­known Un­known Un­known Yes Un­known Un­known
YouTrack Yes No Yes Yes Yes Yes Un­known Yes: JIRA account
Zammad Yes No No No Yes Yes Yes Yes: Twitter, Facebook, Google, Microsoft 365
System Form based Public key cryptography Two-factor OpenID OAuth LDAP Shibboleth Others

Containers
System Docker Image Helm chart
Apache Bloodhound Un­known Un­known
Assembla Tickets Un­known Un­known
Axosoft Un­known Un­known
Bugzilla Yes (Not official) [106] Yes[107]
Debbugs Un­known Un­known
Faveo Helpdesk Un­known Un­known
FogBugz Un­known Un­known
Fossil Un­known Un­known
FusionForge Un­known Un­known
GLPI Un­known Un­known
GNATS Un­known Un­known
HP Quality Center Un­known Un­known
Jira Un­known Un­known
MantisBT Yes (Not official) [108] Un­known
Microsoft Dynamics CRM Un­known Un­known
org-mode Un­known Un­known
OTRS Un­known Un­known
Phabricator Un­known Un­known
Pivotal Tracker Un­known Un­known
Redmine Yes (Official) [109] Yes (Bitnami) [110]
Request Tracker Un­known Un­known
Roundup Un­known Un­known
StarTeam Un­known Un­known
Supportworks Un­known Un­known
SysAid Un­known Un­known
Team Foundation Server Un­known Un­known
TestTrack Un­known Un­known
Trac Un­known Un­known
TrackerSuite.Net Un­known Un­known
Tuleap Un­known Un­known
Twproject Un­known Un­known
Wrike Un­known Un­known
YouTrack Un­known Un­known
Zammad Yes Yes
System Docker Image Helm chart

See also

Notes
  1. Debian's bug tracking system was in place as soon as 1994 according to Ian Jackson's Debbugs webpage. However, Debbugs, as a generic ITS engine, was only uploaded to Debian as version 1 in January 1999.
  2. The Ruby on Rails console can be used to manually create tickets or replies

References
  1. "Apache Bloodhound project summary". Ohloh. Retrieved 3 April 2013.
  2. "The Origin of Wasabi". Fog Creek Blog. Archived from the original on 2012-09-01. Retrieved 2012-10-04.
  3. "Hornbill Systems: Support Works Helpdesk". 1998-02-07. Archived from the original on February 7, 1998. Retrieved 2010-03-07.
  4. Zammad Website https://zammad.com/en/company. Retrieved 18 December 2020. Missing or empty |title= (help)
  5. System supports service level agreement management
  6. System has a plugin API to allow integration with other products
  7. "BloodhoundSearch – Apache Bloodhound". Archived from the original on 2013-09-10. Retrieved 2013-04-23.
  8. "Testopia is a test case management extension for Bugzilla". Mozilla.org. 2010-10-05. Retrieved 2011-10-21.
  9. "New Features in 2.18 :: Bugzilla". bugzilla.org. 2006-10-02. Retrieved 2011-11-16.
  10. "Bug 232612 - enable boolean mode fulltext searches". Bugzilla.mozilla.org. Retrieved 2011-10-21.
  11. "Bug 310717 - Oracle Bugzilla::DB::Oracle module". Bugzilla.mozilla.org. Retrieved 2011-10-21.
  12. "Bug 365258 - PostgreSQL Use tsearch2 for fulltext indexing when available". Bugzilla.mozilla.org. Retrieved 2011-10-21.
  13. Bugzilla 3.4.2 Release Notes
  14. "FogBugz - Features - Customizable Case List". fogcreek.com. Retrieved 2010-03-25.
  15. "Searching in FogBugz". Fogcreek.com. Retrieved 2011-10-21.
  16. "Searching in FogBugz - About the FogBugz Search Engine". Fogcreek.com. Retrieved 2011-10-21.
  17. "Feature Request: index content of certain attachments (e.g. Word documents) in Wiki articles". Fogbugz.stackexchange.com. Retrieved 2011-10-21.
  18. "Fossil Server command - running multiple instances". fossil-scm.org. Retrieved 2011-01-11.
  19. "Fossil: To Do List". Fossil-scm.org. Retrieved 2011-10-21.
  20. "Multiple vendors". Confluence.atlassian.com. 2011-10-03. Retrieved 2011-10-21.
  21. "Plugins.atlassian.com". Plugins.atlassian.com. Retrieved 2011-10-21.
  22. "JIRA - Performing Text Searches". Confluence.atlassian.com. Retrieved 2011-10-21.
  23. "JIRA Searchable Attachments Plugin". Studio.plugins.atlassian.com. Retrieved 2011-10-21.
  24. Edit a JIRA Issue at the same time by two Users result in last save wins
  25. "Mantis Feature List". Mantisbt.org. 2011-02-16. Retrieved 2011-10-21.
  26. "0012319: Index attachments' content". MantisBT. Retrieved 2011-10-21.
  27. Jenkins
  28. Commercial plugin available (Redmine Reporting)
  29. "Redmine".
  30. Free plugin available (Redmine PostgreSQL Search)
  31. Added by Xabier Elkano about (2010-09-14). "Xapian search plugin". Redmine. Retrieved 2011-10-21.
  32. Redmine Feature #8691 Better handling of issue update conflict
  33. "Feature list". Bestpractical.com. Retrieved 2011-10-21.
  34. Needs a third-party extension (RT-Extension-SLA)
  35. RT can be extended through Perl extensions, see for example RTX:: modules on MetaCPAN.org
  36. "Best Practical: What's New in 4: Fast full-text searching". Blog.bestpractical.com. 2011-06-27. Retrieved 2011-10-21.
  37. "Roundup Design Detector Interface". Roundup-tracker.org. Retrieved 2014-01-03.
  38. "Roundup Features". Roundup-tracker.org. Retrieved 2011-10-21.
  39. "Roundup Wiki - Rewriting the full-text indexer". Roundup-tracker.org. 2004-10-13. Retrieved 2011-10-21.
  40. Borland
  41. 5005 API exists but is undocumented
  42. "Smarter search and recent object functionality " teamwork's blog". Blog.twproject.com. 2009-02-20. Retrieved 2011-10-21.
  43. "Test Manager plugin". Retrieved 2014-01-03.
  44. "List of trac plugins". Trac.edgewall.org. 2011-08-11. Retrieved 2011-10-21.
  45. "Trac 1.0". Trac.edgewall.org. 2010-09-11. Retrieved 2014-01-03.
  46. "trac - Advanced Search - Indexing". Trac.edgewall.org. 2010-04-10. Retrieved 2011-10-21.
  47. Trac #7145 Improve handling of conflicts due to concurrent ticket edits
  48. "YouTrack integration with test management tools". Confluence.jetbrains.net. 2010-08-02. Retrieved 2011-10-21.
  49. "YouTrack Support Workflow and Response SLAs".
  50. "YouTrack integrates with other products via REST API". Confluence.jetbrains.net. 2011-09-09. Retrieved 2011-10-21.
  51. "YouTrack - Search for issues". Jetbrains.com. Retrieved 2011-10-21.
  52. Zammad Website: SLA Feature https://zammad.com/en/product/features/sla. Retrieved 18 December 2020. Missing or empty |title= (help)
  53. Zammad Website: Full-text search Feature https://zammad.com/en/product/features/full-text-search. Missing or empty |title= (help)
  54. Zammad Features https://zammad.com/en/product/features. Retrieved 18 December 2020. Missing or empty |title= (help)
  55. "List of Mylyn connector extensions". Wiki.eclipse.org. 2011-08-23. Retrieved 2011-10-21.
  56. "Pluggable email handler for Trac". Trac Hacks. Retrieved 3 April 2013.
  57. "email2trac utilities". SURF SARA. Retrieved 28 February 2014.
  58. "Tasktop Dev for Visual Studio". Visual Studio Gallery. Archived from the original on 2016-08-22. Retrieved 2016-08-08.
  59. "XML-RPC doesn't work in IIS". Mozilla. 7 December 2011. Archived from the original on 3 August 2014. Retrieved 21 March 2014.
  60. "HP ALM Explorer Add-in". HP. Archived from the original on 2012-06-20. Retrieved 2012-03-23.
  61. "QcMylyn". Sourceforge.net. 2010-11-15. Retrieved 2011-10-21.
  62. Using JIRA on a mobile device
  63. By third-party extension: plugins.atlassian.com
  64. Launchpadlib is a Python client library for the Launchpad RESTful API.
  65. Feature #19097: Responsive layout for mobile devices - Redmine
  66. "REST API for Request Tracker". Wiki.bestpractical.com. Retrieved 2011-10-21.
  67. "XML-RPC access to Roundup". roundup-tracker.org. Retrieved 11 November 2016.
  68. Through 5005 API, but is undocumented
  69. #11953 (Responsive design for user interface) – The Trac Project
  70. Introducing YouTrack Mobile
  71. "Youtrack.mylyn.connector". Alexander Marchuk. Retrieved 5 November 2014.
  72. "Request Tracker RSS support". Wiki.bestpractical.com. 2011-10-14. Retrieved 2011-10-21.
  73. "FeedGeneration". wiki.roundup-tracker.org. 2009-02-01. Retrieved 2018-07-14.
  74. via the PerforcePlugin
  75. via the Mercurial SCM Plug-In For Axosoft
  76. "Git Bugzilla Extension". Theoldmonk.net. 2007-06-03. Retrieved 2011-10-21.
  77. "Mercurial Bugzilla Extension". Mercurial.selenic.com. 2010-08-28. Retrieved 2011-10-21.
  78. Visual SourceSafe, Vault
  79. Fossil
  80. "Defect Tracking Gateway". Perforce. Retrieved 2012-01-10.
  81. No diff, just virtual version numbers.
  82. There is an unsupported plugin for associating issues with ClearCase check-ins for an outdated version of JIRA. ClearCase support through Atlassian FishEye has been removed in all versions since April 2012. End of Support Announcement for IBM ClearCase
  83. Commit Policy Plugin integrates JIRA with Bitbucket Server (formerly known as Atlassian Stash), in addition to Subversion, Git and Mercurial.
  84. via the SourceHgWeb plugin Archived 2012-03-02 at the Wayback Machine
  85. newly supported
  86. via the bzr-tfs plugin
  87. via the SVNBridge
  88. Via TeamCity integration
  89. Visual SourceSafe, Team Foundation Server, Borland StarTeam
  90. "SSL Authentication Plugin". giel. 2009-07-01. Retrieved 2010-05-27.
  91. "OpenID Authentication Plugin". Dalius Dobravolskas. 2010-05-27. Archived from the original on 2010-06-02. Retrieved 2010-05-27.
  92. "Bugzilla:OpenID Auth Plugin". Rob Lanphier. 2013-03-30. Retrieved 2015-05-07.
  93. "Jira 3.8". Archived from the original on 2012-05-22. Retrieved 2012-08-01.
  94. "Jira 4.x". Archived from the original on 2016-03-05. Retrieved 2020-07-26.
  95. "Connecting to Crowd or Another JIRA Server for User Management - JIRA 6.4 EAP - Atlassian Documentation".
  96. "MantisBT bug #8199: Add Open ID support". MantisBT. 2009-01-15. Retrieved 2010-05-27.
  97. "MantisBT bug #11219: Provide OAuth inter-application authentication "tokens" mechanism". MantisBT. 2010-05-27. Retrieved 2010-05-27.
  98. "Redmine SSL Auth plugin". Jorge Bernal. 2010-01-09. Retrieved 2010-05-27.
  99. "Redmine Feature #699: OpenID login". Redmine. 2009-02-11. Retrieved 2010-05-27.
  100. Needs a third-party extension (RT-Authen-OpenID on MetaCPAN.org)
  101. Needs a third-party extension (RT::Authen::ExternalAuth)
  102. See available extensions
  103. developed by bugs.python.org team
  104. See page on ShibbolethLogin
  105. Supports AUTHORIZATION header/var from front end authenticating web server/proxy.
  106. "Bugzilla Docker image".
  107. "Bugzilla Helm chart".
  108. "MantisBT Docker image".
  109. "Redmine Official Docker Image".
  110. "Bitnami redmine chart".
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