admariner/flagsmith

Flagsmith is an open-source feature flagging and remote configuration service that allows developers to control feature releases, run A/B tests, and manage user segments without deploying new code. It provides SDKs for 15+ languages and frameworks, enabling teams to toggle features on/off for different environments, users, or segments. The project is ideal for development teams looking to ship faster with granular control over feature rollouts while maintaining the option to self-host or use their managed service.