Flipt
A source-available feature-management platform with boolean/variant flags, segments, constraints, Git workflows, and client/server SDKs.
Why use it
Teams progressively release modes, disable faulty features quickly, and expose different settings to test cohorts.
Where it fits
Use analytics, feedback, player support, and updates to fix issues and decide what to improve after launch.
What to check
Its current Fair Core license restricts competing hosted use; flags also multiply states, and client values cannot hold secrets.