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OpenAlternative

Open Source Optimizely Alternatives

A curated collection of the 6 best open source alternatives to Optimizely.

The best open source alternative to Optimizely is Unleash. If that does not suit you, we have compiled a ranked list of other open source Optimizely alternatives to help you find a suitable replacement.

Optimizely alternatives are mainly Build & Deployment. Browse these if you want a narrower list of alternatives or are looking for a specific functionality of Optimizely.

Written by OpenAlternative Last updated: June 2, 2026
#1

Unleash

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 test...

#2

GrowthBook

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 ...

#3

Flagsmith

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 t...

#4

FeatBit

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 mitigat...

#5

Featurevisor

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, experiment...

#6

Abby

Abby offers open-source, fully typed feature flagging and remote configuration for React and Next.js, with multi-environment testing and debugging too

Abby offers open-source, fully typed feature flagging and remote configura...