Top Open Source Feature Flags Tools in 2026
A curated collection of the 8 best free and open-source Feature Flags tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
Flipt
A feature flag platform that integrates with Git workflows, enabling developers to manage features directly in their codebase.
Stars4,884Last commit11d agoLicenseOpen Source
Abby
Open-source feature flags, remote config, and A/B testing for developers
Stars167Last commit18mo agoLicenseAGPL-3.0GrowthBook
Powerful, developer-friendly experimentation tool for data-driven product decisions. Seamless integration, real-time insights, and flexible deployment.
Stars8,161Last commit10d agoLicenseOpen Source
Unleash
Enterprise feature management platform with flags and kill switches
Stars13,762Last commit10d agoLicenseAGPL-3.0Flagsmith
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.
Stars6,531Last commit10d agoLicenseBSD-3-ClauseFeatBit
FeatBit is a fast, scalable feature flag service that enables risk mitigation and fosters business growth through controlled feature releases.
Stars1,904Last commit10d agoLicenseMITFeaturevisor
Featurevisor is an open-source tool for managing feature flags, experiments, and remote configuration directly from your Git repository.
Stars805Last commit14d agoLicenseMIT
0 Finance
CLI-first banking for agents
Stars249Last commit5mo agoLicenseMIT