NextAuth.js (Auth.js) vs Supabase(2026)
NextAuth.js (Auth.js) is better for teams that need free and open source. Supabase is the stronger choice if full postgres with sql. NextAuth.js (Auth.js) is free and Supabase is freemium (from $25/month).
Full feature breakdown, pricing details, and pros & cons below.
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NextAuth.js (Auth.js)
NextAuth.js is a complete authentication library for Next.js applications with adapters for 60+ databases and providers.
Visit NextAuth.js (Auth.js)Supabase
Supabase is an open source Firebase alternative providing a Postgres database, Auth, realtime, storage, and edge functions.
Starting at $25/month
Visit SupabaseHow Do NextAuth.js (Auth.js) and Supabase Compare on Features?
| Feature | NextAuth.js (Auth.js) | Supabase |
|---|---|---|
| Pricing model | free | freemium |
| Starting price | Free | $25/month |
| 40+ OAuth providers | ✓ | — |
| Database adapters | ✓ | — |
| JWT sessions | ✓ | — |
| Email magic links | ✓ | — |
| Credentials auth | ✓ | — |
| PostgreSQL | — | ✓ |
| Authentication | — | ✓ |
| Realtime | — | ✓ |
| Storage | — | ✓ |
| Edge Functions | — | ✓ |
| Auto-generated APIs | — | ✓ |
NextAuth.js (Auth.js) Pros and Cons vs Supabase
N
NextAuth.js (Auth.js)
+Free and open source
+No vendor lock-in
+Highly flexible
+Full control
−More setup required
−No prebuilt UI
−Docs can be confusing
S
Supabase
+Full Postgres with SQL
+Built-in auth and storage
+Open source
+Great free tier
−Free tier pauses after 1 week inactive
−Self-hosting is complex
−Edge functions limited
Should You Use NextAuth.js (Auth.js) or Supabase?
Choose NextAuth.js (Auth.js) if…
- •Free and open source
- •No vendor lock-in
- •Highly flexible
Choose Supabase if…
- •Full Postgres with SQL
- •Built-in auth and storage
- •Open source