{"data":{"slug":"unleash","name":"Unleash","tagline":"AGPLv3 feature flags; OSS caps 1 project / 2 environments","category":"nextjs","categoryName":"Next.js","url":"https://www.getunleash.io/open-source","github":"https://github.com/Unleash/unleash","pricing":"open-source","hook":"Unleash is AGPLv3 feature flags you self-host when PostHog flags are bolted onto analytics.","whatsGood":"AGPLv3. Dedicated feature-flag server. Self-host is the free path. SDKs across stacks. Open-source page is the pitch — not Cloud trial.","theCatch":"Loud: OSS caps Projects 1 / Environments 2. Cloud = Enterprise trial FAIL — pitch self-host only. Vs PostHog dedicated-flags-inside-analytics. Distinct from PostHog.","verdict":"AGPLv3 flags. Self-host with OSS caps; Cloud trial is not free forever.","addedAt":"2026-09-04","featured":false,"domain":"Observability","subSpecialty":"Feature Flags","capabilities":["flags"],"surfaces":["Self-host"],"ecosystem":["Multi-platform"],"licenseModel":"AGPL","githubStars":13782},"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/unleash","html":"/gems/unleash","markdown":"/gems/unleash.md","category":"/api/gems?category=nextjs","categoryPage":"/stacks/nextjs"}}