Auth
Auth.js (NextAuth)
Self-hosted auth library — free forever, you own the data.
Free tier
Free OSS — costs only what your DB and host cost
- No managed service — you handle sessions, tokens, and DB schema.
- Excellent for Next.js; works with most providers out of the box.
Last verified 2026-05 · free-tier numbers shift — confirm at the pricing page before relying on a quota for a launch decision.