by Nulab
Pricing: Free for 10 users and 1 project; Starter $35/mo, Standard $100/mo, Premium $175/mo billed monthly, about 17% less billed annually; Enterprise by quote. No per-user fees.
Backlog is Nulab's project management and issue tracking tool with Git hosting, Gantt charts and a wiki, sold at a flat price per plan rather than per user.