GrowthBook is an open-source experimentation platform that lets teams launch A/B tests, feature flags, and product rollouts from code. It connects to existing data warehouses and product analytics tools to measure results without replacing your stack. Teams can self-host for free or use managed GrowthBook Cloud.
Self-hosted GrowthBook is free under an MIT license and can be run on your own infrastructure. GrowthBook Cloud offers a free tier for small teams plus paid Pro and Business plans that scale by monthly tracked users and seats, adding unlimited projects, advanced SSO, audit logs, warehouse connections, and priority support; published cloud pricing commonly starts around $100/month for Pro and $400/month for Business, with Enterprise adding custom SLAs, security reviews, and dedicated success support.
Open Source
GrowthBook stands out for teams that want experimentation and feature flags without proprietary lock-in, especially if they already have a data warehouse. It is developer-friendly and cost-effective, but self-hosting and warehouse setup can require engineering effort. It is best for product, engineering, and data teams that need code-first A/B testing and scalable feature management.
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