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AuthTop pick

Clerk

Drop-in auth with prebuilt UI — magic links, social, MFA, organizations.

Visit ClerkVerify on pricing page
Free tier

10k MAU free, social + email/password + magic link, no SSO

  • MAU billing is honest — only counts users who actually authenticated.
  • Org/team features are paid; personal projects rarely need them.
Alternatives

Drop-in alternatives

Solve a similar problem if you outgrow Clerk's free tier — or just want a second option in your back pocket.

Supabase Auth

Auth bundled with Supabase — one less vendor if you're already in.

50k MAU free as part of Supabase project, OAuth + email + magic link

Auth2026-05

Auth.js (NextAuth)

Self-hosted auth library — free forever, you own the data.

Free OSS — costs only what your DB and host cost

Auth2026-05
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Curated stacks featuring Clerk

Last verified 2026-05 · free-tier numbers shift — confirm at the pricing page before relying on a quota for a launch decision.