The best open source alternative to Optimizely is Replane. If that doesn't suit you, our users have ranked more than 50 alternatives to Optimizely and six of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Optimizely are GrowthBook, Wasabi, FeatBit and Abby.
Replane is an open-source, self-hosted platform for feature flags and dynamic configuration. It lets teams change feature toggles, rate limits, and app settings in real-time without redeploying code—updates propagate to connected services in under a second via Server-Sent Events.
Wasabi A/B Testing Service is a real-time, enterprise-grade, 100% API driven project. Users are empowered to own their own data, and run experiments across web, mobile, and desktop. Instrumentation is minimal.
FeatBit is a scalable, fast, and 100% open-source feature flags management platform that empowers all teams to deliver, control, experiment with and monetize their software.
OpenFlags is a lightweight, developer-first feature flagging platform designed to give teams full control over their release cycle without the "enterprise tax" or external dependencies. Built with Bun and TypeScript, it focuses on extreme performance, local evaluation...
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