Clerk

Drop-in authentication and user management.

Is Clerk right for you?

Clerk is ranked #5 of 5 in Backend, database & auth on ShipStack. Best for: Adding auth fast. Best prebuilt auth UI.

Postgres backend with auth, storage, and realtime.

💲 Free; Pro from $25/mo

Best for: Default backend for vibe-coded apps

Most integrated with AI builders

Google's app backend: auth, Firestore, hosting.

💲 No-cost tier; pay-as-you-go beyond free quotas

Best for: Mobile and realtime apps

Mature, broad feature set

Reactive TypeScript backend platform for apps and agents.

💲 Free/Starter pay-as-you-go; Professional $25/dev/mo

Best for: Realtime TS apps

Great DX, typesafe