Clerk vs Supabase Auth
Verdict
Clerk wins for drop-in auth UI and SSO. Supabase Auth wins if you already use Supabase or need RLS.
| Dimension | Clerk | Supabase |
|---|---|---|
| Setup | ✓ Drop-in components, 5 minutes | API-based, more wiring needed |
| UI components | ✓ Pre-built, customizable | Build your own (or use third-party) |
| Database | Hosted (external to your DB) | Tied to Supabase Postgres + RLS |
| SSO/OAuth | ✓ 20+ providers, easy config | Supported but more manual |
| Free tier | 10K MAU free | ✓ 50K MAU free (Supabase plan) |
| Best for | Quick auth with polished UI | Supabase users, RLS-based security |