Most holdouts measure only shipped features. Ours measure everything—including failed experiments. This technical deep dive reveals why we chose reality over clean rooms, and how we built it.
Many teams ship features weekly but struggle to measure their true cumulative impact. Holdouts in GrowthBook provide a simple way to maintain a control group across multiple features, answering the critical question: What did all this shipping actually do to our key metrics?
Stop guessing what works and start knowing: A/B testing transforms hunches into data-driven decisions, turning every change on your website from a risky bet into a calculated experiment that can boost conversions without spending more on traffic.
Why bolting AI onto existing products is like adding lightbulbs to steam factories. Lessons from Ford to ChatGPT on truly transformative tech adoption.
Feature flags without the performance hit. GrowthBook's Vercel Marketplace integration syncs flags to Edge Config for zero-latency evaluation—finally, experimentation that doesn't slow down your app.
GrowthBook 4.0 includes a huge number of new features and updates. Continue reading for a full list of changes.
GrowthBook provides you with 3 different types of experimentation for different purposes: Bandits for picking a winner among many, Safe Rollouts for releasing safely, and Experiments for learning.
GrowthBook's new SQL Explorer lets you run queries, analyze data, and create visualizations without leaving the platform.
This week we're launching our Managed Warehouse and Feature Flag Usage Analytics.
A platform builder discovers why experimentation tools need to become more fluid. How MCP and conversational AI are creating experimentation's ambient era.
For week 3 of our Launch Month, we're releasing SQL Explorer, which lets you query your data and visualize results.
Feature flags let you turn functionality on or off without deploying new code, enabling instant rollbacks and progressive rollouts that transform risky all-or-nothing releases into safe, controlled feature launches.
In under two minutes, GrowthBook can be set up and ready for feature flagging and A/B testing, whether you use our cloud or self-host.
