7 Best Open Source Optimizely Alternatives
A curated collection of the 7 best open source and self-hosted alternatives to Optimizely in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for Optimizely in 2026? The top open-source alternative is PostHog — All-in-one product analytics platform. Track user behavior, run experiments, and make data-driven decisions to grow your product..
Other highly rated open-source Optimizely alternatives include Unleash, GrowthBook and Flagsmith.
All-in-one product analytics platform. Track user behavior, run experiments, and make data-driven decisions to grow your product.
All-in-one product analytics platform. Track user behavior, run experiments, and make data-driven decisions to grow your product.
A powerful feature management platform enabling gradual rollouts, A/B testing, and seamless integration for continuous delivery.
A powerful feature management platform enabling gradual rollouts, A/B testing, and seamless integration for continuous delivery.
Powerful, developer-friendly experimentation tool for data-driven product decisions. Seamless integration, real-time insights, and flexible deployment.
Powerful, developer-friendly experimentation tool for data-driven product decisions. Seamless integration, real-time insights, and flexible deployment.
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.
FeatBit is a fast, scalable feature flag service that enables risk mitigation and fosters business growth through controlled feature releases.
FeatBit is a fast, scalable feature flag service that enables risk mitigation and fosters business growth through controlled feature releases.
Featurevisor is an open-source tool for managing feature flags, experiments, and remote configuration directly from your Git repository.
Featurevisor is an open-source tool for managing feature flags, experiments, and remote configuration directly from your Git repository.
Open-source feature flags, remote config, and A/B testing for developers
Abby is an open-source platform designed to help developers manage feature flags, remote configurations, and A/B tests with ease. It provides a simple yet powerful way to control feature rollouts, experiment with different configurations, and optimize applications without redeploying code. - Feature Flags: Toggle features on/off dynamically without redeploying your application. - Remote Config: Adjust application behavior in real-time by modifying configurations remotely. - A/B Testing: Run experiments to compare different versions of features and determine the best-performing variant. - Developer-Friendly: Built with developers in mind, offering seamless integration with modern tech stacks. - Self-Hostable: Deploy Abby on your own infrastructure for full control over data and privacy. - Open Source: Free to use, modify, and contribute to under an open-source license. Abby is designed to be self-hosted, allowing you to run it on your own servers or cloud infrastructure. It supports modern deployment practices and can be integrated into CI/CD pipelines for automated feature management. The platform is built with a focus on simplicity, scalability, and developer experience.
About Optimizely
Creating digital experiences that transform your company takes data-driven decisions, continued experimentation and constant invention.