Clerk

Drop-in auth UI: sign-in boxes, user profiles, org switchers

clerk.com · Free to 10k MAU; Pro from $25/mo

Clerk is hosted auth with polished prebuilt React components — sign-in, user button, organization switcher — live in an afternoon, free for the first 10,000 monthly active users.

Capabilities

Capabilities

  • Prebuilt <SignIn/>, <UserButton/>, org management components for React/Next.js
  • MFA, social providers, bot detection handled for you
  • Free to 10k MAU, then from $25/mo

Best for

  • Shipping a polished multi-user app FAST when you do not want to build auth UI

Not for

  • Personal single-user clones (overkill — better-auth is free and simpler)
  • Cost-sensitive apps expecting many users (MAU pricing compounds)