PatchDesk
6.1#18 in game bug tracking softwareFrom $7 a monthWebAPI
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It suits teams of roughly 3–30 people wanting customer ticketing and engineering issue tracking together. It also fits teams needing SLA controls, API access, and role-based security.
YouTrack may fit teams that want project and work management with automation, time tracking, and guest access. The free Cloud plan is limited to 10 users.