Flagsmith Has a Free API — Heres How to Add Feature Flags Without LaunchDarkly

Flagsmith is an open-source feature flag and remote config service. Toggle features, A/B test, and do gradual rollouts — self-hosted or cloud, for free. Why Flagsmith? Open source : Self-host with full control Feature flags : Toggle features without deployments Remote config : Change values without releasing A/B testing : Built-in experiment framework Segments : Target users by attributes Multi-platform : SDKs for every language Free tier : 50K requests/month on cloud Self-Host git clone https://github.com/Flagsmith/flagsmith.git cd flagsmith docker compose up -d Dashboard at http://localhost:8000 REST API: Get Flags curl https://edge.api.flagsmith.com/api/v1/flags/ \ -H 'X-Environment-Key: YOUR_ENV_KEY' REST API: Get Flags for User curl -X POST https://edge.api.flagsmith.com/api/v1/identities/ \ -H 'X-Environment-Key: YOUR_ENV_KEY' \ -H 'Content-Type: application/json' \ -d '{"identifier": "user-123"}' JavaScript SDK import flagsmith from ' flagsmith ' ; await flagsmith . init ({ envi