What is GrowthBook used for?

GrowthBook is an open-source platform for feature flags, A/B experimentation and product analytics that queries your data warehouse, available in the cloud or self-hosted. It is a good fit for running A/B tests on warehouse data, gradual rollouts with feature flags and replacing paid experimentation tools.

Is GrowthBook open source?

Yes. GrowthBook is open source under a custom licence. Its source code is on GitHub at growthbook/growthbook and is written mainly in TypeScript.

Yes. GrowthBook is open source, so the software itself is free to use under the terms of its own licence. A managed cloud version is also available, with paid plans from $40 per seat per month.

Can I self-host GrowthBook?

Yes. GrowthBook can be self-hosted on your own server or infrastructure.

What is GrowthBook an alternative to?

GrowthBook is an open-source alternative to Statsig, Optimizely Feature Experimentation, Split and VWO. Other open-source alternatives to Statsig include FeatBit, Flagsmith and FeatureProbe.

Is GrowthBook actively maintained?

Yes. The most recent commit to GrowthBook was on 2 October 2026, and the latest release is v5.1.0, published on 22 September 2026. The project has 8.5k stars on GitHub.

GrowthBook: open-source alternative to Statsig

About GrowthBook

GrowthBook combines feature flagging, experimentation and product analytics in one open-source platform. The project's stated philosophy is that most companies cannot build an in-house platform of this kind, so it aims to give them the flexibility of one without the effort, instead of paying for closed SaaS tools or stitching together unmaintained libraries.

Feature flags support targeting, gradual rollouts and experiments, with 24 SDKs including React, Python, Android and iOS. The statistics engine offers methods such as CUPED, sequential and Bayesian testing, post-stratification, bandits and sample ratio mismatch checks. It is warehouse native, querying data sources such as BigQuery, Snowflake and Databricks, with metrics defined in flexible SQL. A built-in analytics suite supports dashboards, and there are webhooks, a REST API and an MCP server.

You can start with a free GrowthBook Cloud account or run it yourself with Docker and the prebuilt public image. The repository lists the licence as Other, so review the licence terms for the exact conditions on the open-source and enterprise parts. It suits product and data teams that want to run experiments on their own warehouse data.

Key features

Feature flags with advanced targeting
A/B tests with a Bayesian stats engine
Warehouse-native data source queries
SQL-based metric definitions
Built-in product analytics dashboards
24 SDKs across many languages
REST API, webhooks and MCP server

Good fit for

→Running A/B tests on warehouse data
→Gradual rollouts with feature flags
→Replacing paid experimentation tools

Built with: TypeScript; ClickHouse
Tags: feature-flags; ab-testing; experimentation; product-analytics; warehouse-native; self-hosted; statistics; typescript

GrowthBook: questions and answers

What is GrowthBook used for?: GrowthBook is an open-source platform for feature flags, A/B experimentation and product analytics that queries your data warehouse, available in the cloud or self-hosted. It is a good fit for running A/B tests on warehouse data, gradual rollouts with feature flags and replacing paid experimentation tools.
Is GrowthBook open source?: Yes. GrowthBook is open source under a custom licence. Its source code is on GitHub at growthbook/growthbook and is written mainly in TypeScript.
Is GrowthBook free?: Yes. GrowthBook is open source, so the software itself is free to use under the terms of its own licence. A managed cloud version is also available, with paid plans from $40 per seat per month.
Can I self-host GrowthBook?: Yes. GrowthBook can be self-hosted on your own server or infrastructure.
What is GrowthBook an alternative to?: GrowthBook is an open-source alternative to Statsig, Optimizely Feature Experimentation, Split and VWO. Other open-source alternatives to Statsig include FeatBit, Flagsmith and FeatureProbe.
Is GrowthBook actively maintained?: Yes. The most recent commit to GrowthBook was on 2 October 2026, and the latest release is v5.1.0, published on 22 September 2026. The project has 8.5k stars on GitHub.