GrowthBook

In plain words

GrowthBook is an open-source platform for feature flagging and experimentation. It enables developers to safely release features to production while measuring their impact on key metrics. The tool serves as an alternative to proprietary solutions, offering teams control over feature rollouts and the ability to track performance changes through built-in analytics capabilities.

written from the facts on this page · September 2026

From the sources

GrowthBook is an open source feature flagging and experimentation platform. Safely release features to production and measure the impact on your key metrics.

GrowthBook 5.0 is here: AI agents, a new AI Visual Editor, Product Analytics GA, flag governance, and faster experiments.

It’s not enough to write code and ship at the speed of AI. Companies that win consistently make their products better. GrowthBook 5.0 enables companies to build, ship, and improve their product at any scale. Our last major release (v4) shipped a year ago. Since then, we’ve rewritten feature flags from scratch, built Product Analytics, made experimentation significantly faster, and integrated AI throughout. GrowthBook 5.0 crystallizes the last year of work, and it’s big enough that a minor version number just wouldn’t do. We've touched nearly every corner of the platform, from how experiments are built to how flags are governed. And we’ve opened experimentation to your whole team, not just…from growthbook.io

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