Experiment fearlessly, deliver confidently

The #1 Open-Source Feature Flag & Experimentation Platform

Get Started

Trusted by thousands of organizations

Easily measure the success of your products while minimizing engineering and data resources.

John Resig

Khan Academy

GrowthBook is so good. One of the only options that's actually able to load fast, be cacheable, support storing data off-site, and handle synchronous rendering on the client.

Pat McGee

Principal Engineer, GoodDog

"GrowthBook checked all my boxes. The fact that it just queries our data warehouse means we can set up much more sophisticated metrics that are based on tables our data team has built with DBT instead of being tied to just querying raw event data."

Alexander Harmsen

CEO & Founder, Global Predictions

"We've been using the product over the last month to run a few dozen tests and have already increased our overall funnel conversion by about 54%!"

Feature Flags & Experiments Together

Seamless integration makes it easy to release, target and measure the impact of product changes from a single platform.

Feature Flagging

Launch with confidence. Maintain an uncluttered code base as you scale.

Explore Feature Flagging

A/B Testing

Manage experiments end-to-end for continuous product improvements.

Explore Experiments

GrowthBook serves 100 billion+ feature flag lookups per day

Maintain Full Control of Your Data

GrowthBook provides complete data transparency for more accurate and trustworthy results.

Open Source

Self-host for Ultimate Control and Security

We build GrowthBook in the open on GitHub and release daily. GrowthBook is certified SOC II and GDPR compliant.

Get Started

Warehouse Native

Use Your Existing Data and Metrics

GrowthBook integrates seamlessly with any data warehouse, powered by SQL for complete flexibility. Maintain full control over your data and customize metrics to suit your needs, pulling everything from your existing storage to run and analyze experiments.

Get Started

Performance

Designed for Speed & Optimal User Experience

Our industry-leading lightweight SDKs with local real-time evaluation means superfast load times. Combine with our highly-customizable cacheing for uptime and resiliency.

Get Started

Built for Teams

Promote a culture of experimentation across your organization.

Industry-leading Lightweight SDKs

Our JS SDK is 9k—less than half the size of our closest competitors. Dramatically reduce load times with our open source SDKs for JavaScript, Python, Ruby, PHP. Use our intuitive API for other languages.

View All SDKs

View API Docs

Enterprise-class Experimentation

Our robust Bayesian and Frequentist statistic engines, along with our configurable metric library, means you can customize GrowthBook to exactly match your needs.

View Docs