{"data":{"slug":"growthbook","name":"GrowthBook","tagline":"MIT-core flags+experiments; Cloud Starter Free, self-host unlimited users","category":"nextjs","categoryName":"Next.js","url":"https://growthbook.io","github":"https://github.com/growthbook/growthbook","pricing":"freemium","hook":"GrowthBook is MIT-core flags and A/B when PostHog owns the warehouse-native analytics seat.","whatsGood":"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.","theCatch":"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.","addedAt":"2026-09-04","featured":false,"domain":"Observability","subSpecialty":"Feature Flags","capabilities":["flags","experiments"],"surfaces":["Self-host","Hosted"],"ecosystem":["Multi-platform"],"licenseModel":"Freemium","githubStars":8282},"related":[{"slug":"vercel","name":"Vercel","tagline":"The platform that made Next.js deployment trivial"},{"slug":"prisma","name":"Prisma","tagline":"Type-safe database access with killer DX"},{"slug":"drizzle","name":"Drizzle ORM","tagline":"TypeScript ORM that feels like SQL"},{"slug":"trpc","name":"tRPC","tagline":"End-to-end typesafe APIs without codegen"},{"slug":"clerk","name":"Clerk","tagline":"Auth that actually ships with your UI"}],"links":{"self":"/api/gems/growthbook","html":"/gems/growthbook","markdown":"/gems/growthbook.md","category":"/api/gems?category=nextjs","categoryPage":"/stacks/nextjs"}}