Open source feature-flags projects
Every project in the registry tagged feature-flags, ranked by real GitHub adoption.
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Feature flags for rapid, risk-free software deployment
Self-hosted session replay with complete data control
Feature flags and remote config for rapid deployment
Comprehensive analytics for data-driven decisions
Git-native feature management for developers
🐬 Beautiful, performant feature flags for Ruby.
Open-source feature flag management for seamless deployments
Privacy-first analytics without cookies or tracking
Feature management with GitOps for developers
Type-safe feature flags and remote config for developers
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Frequently asked questions
How many open source feature-flags projects are there?
This registry tracks 11 projects tagged feature-flags, with 93,212 GitHub stars between them. The most-adopted is PostHog at 40,584 stars.
Are these feature-flags projects free to use?
Yes — 7 of the 11 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which feature-flags project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these feature-flags projects still maintained?
10 of the 11 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.