JIRA, GitLab, Redmine, OpenProject, osTicket, Mantis Bug Tracker, Eventum, not8, Request Tracker, jtrac, ProjeQtOr, FogBugz, MantisHub, Flyspray, Issue Tracker, The Bug Genie, uBugtrack, Allegra, Lavagna, Futuramo Visual Tickets, NodePoint, Apache Bloodhound, SCM-Manager Universe, BugTower, Cloudogu EcoSystem, Vermis, Zoho BugTracker, Bugira, Retrospectiva, Pivotal Tracker, Lean Testing, XBtrack task and bug tracker, IssueBurner, 16bugs, Akiri DevBox, Aiveo, CA Agile Central, Bugify are some alternatives to Bugzilla.