Bugzilla vs GitHub Issues

Bugzilla is a self-hosted, web-based system for tracking defects, issues, enhancements, and other product change requests. It is free and open source, and runs on Linux, macOS, and Windows, with API access. Its search ranges from full-text queries to advanced searches, including time-based criteria. Users can choose which bug-change emails they receive, and scheduled search reports can be sent as often as every fifteen minutes. Reports can include tables and graphs, and can be exported as CSV. Administrators can tailor workflows, statuses, resolutions, and fields, then extend an installation with templates and extensions. Groups control who can view or edit bugs; an insider group can make comments and attachments private. Bugzilla supports XML-RPC and JSON-RPC services, several authentication methods, and MySQL, PostgreSQL, or Oracle databases. Its Patch Viewer connects with LXR, CVS, and Bonsai. Support is community-based through mailing lists and chat rooms; the project does not directly provide commercial support.

GitHub Issues has no write-up on Specifiction yet; its figures are above.