# GrowthBook

> MIT-core flags+experiments; Cloud Starter Free, self-host unlimited users

**Category:** Next.js  
**Pricing:** freemium  
**URL:** https://growthbook.io  
**GitHub:** https://github.com/growthbook/growthbook  
**Added:** 2026-09-04

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## The Hook

GrowthBook is MIT-core flags and A/B when PostHog owns the warehouse-native analytics seat.

## What's Good

MIT core. Cloud Starter Free — no CC — unlimited flags/experiments (3 users / 1 project). Self-Hosted OSS unlimited users. Experiment stats engine included. Do not reprint Pro seat prices.

## The Catch

Warehouse-native experimentation competitor to PostHog — different pitch (flags+experiments first). Cloud Starter Free has user/project caps; self-host OSS uncapped users. Distinct from PostHog.

## Verdict

MIT-core flags+experiments. Cloud Starter Free is real; ignore Pro seats.