Auth
An honest comparison to help you pick the right auth tool in 2026.
| Feature | NextAuth (Auth.js) | Supabase Auth |
|---|---|---|
| Category | Auth | Auth |
| Free Tier | Yes | Yes |
| Paid Plan | $0 | Included with Supabase |
| Enterprise | N/A | Custom |
| Best For | Next.js developers who want free, open-source auth with full control over their setup | Supabase users who want integrated auth that works seamlessly with Postgres row-level security |
| Feature 1 | Open source | Email/password |
| Feature 2 | 50+ providers | Magic links |
| Feature 3 | Database adapters | Social providers |
| Feature 4 | JWT/session support | Row-level security |
| Feature 5 | Framework agnostic | JWT tokens |
| Website | NextAuth (Auth.js) | Supabase Auth |
NextAuth (Auth.js) and Supabase Auth are both popular choices in the auth category, but they serve different types of developers. NextAuth (Auth.js) is open-source authentication library for Next.js and other frameworks with provider-based architecture and database adapters. Meanwhile, Supabase Auth is supabase's built-in auth with email/password, magic links, social providers, and row-level security integration.
Both tools offer free tiers, which means you can try each one before committing. NextAuth (Auth.js)'s paid plan starts at $0, while Supabase Auth's starts at Included with Supabase.
NextAuth (Auth.js) stands out with Open source and 50+ providers, while Supabase Auth differentiates itself through Email/password and Magic links. The right choice depends on which capabilities matter most for your workflow. Ultimately, next.js developers who want free, open-source auth with full control over their setup, while Supabase Auth is best for supabase users who want integrated auth that works seamlessly with Postgres row-level security.
NextAuth (Auth.js): Free tier available. Paid plans start at $0.
Supabase Auth: Free tier available. Paid plans start at Included with Supabase. Enterprise pricing: Custom.
Choose NextAuth (Auth.js) if you value open source and 50+ providers. Go with Supabase Auth if supabase users who want integrated auth that works seamlessly with Postgres row-level security. Both are solid auth options in 2026 — the best pick depends on your team size, budget, and technical requirements. We recommend trying both (especially if they have free tiers) before committing to one.
Not sold on either NextAuth (Auth.js) or Supabase Auth? Check out these other auth tools:
See all NextAuth (Auth.js) alternatives or Supabase Auth alternatives.
Read more about auth on our Vibe Coding page.
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