| Website | growthbook.io |
| Category | Experimentation / Feature Flags |
| License | MIT (open source) |
| Pricing | Free (self-hosted), Cloud from $75/mo |
Overview
GrowthBook is an open-source feature flagging and experimentation platform. Feature flags, A/B testing, Bayesian statistics. Data warehouse-native.
Pros
- MIT license
- Feature flags + A/B testing in one
- Bayesian statistical engine
- Data warehouse integration
- SDK for all major languages
- Self-hosted option
Cons
- Less polished UI than LaunchDarkly
- Statistical analysis requires data skills
- Self-hosting needs PostgreSQL
- Smaller ecosystem
- Limited visual editor
Verdict
GrowthBook is the best open-source platform for teams that want feature flags AND experimentation. The Bayesian statistical engine gives you rigorous A/B test results, data warehouse integration means you analyze with your existing data, and the MIT license means unlimited self-hosted experimentation.
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