A side-by-side feature comparison of Supabase's open-source auth, Auth0's enterprise platform, and AuthFlow — so you can pick the right auth layer for your application.
| Feature | SBSupabase Auth | A0Auth0 | AuthFlow |
|---|---|---|---|
| Core Authentication | |||
| Email & Password Authentication | Yes | Yes | Yes |
| Magic Links / Passwordless | Yes | Yes | No |
| Anonymous Authentication | Partial | No | No |
| Security | |||
| JWT Token Management | Yes | Yes | Yes |
| RS512 Key-Pair Signing | Partial | Yes | Yes |
| Two-Factor Authentication (2FA) | Yes | Yes | Yes |
| TOTP Authenticator App (Google Auth, Authy) | Yes | Yes | Yes |
| 2FA Backup Codes | Partial | Yes | Yes |
| 2FA via Email OTP | Partial | Yes | Yes |
| Rate Limiting | Yes | Yes | Yes |
| Email Verification | Yes | Yes | Yes |
| Password Reset / Forgot Password | Yes | Yes | Yes |
| Password Complexity Enforcement | Yes | Yes | Yes |
| User & Org Management | |||
| User Management Dashboard | Yes | Yes | Yes |
| Role-Based Access Control (RBAC) Supabase uses Row-Level Security (RLS) policies in Postgres | Yes | Yes | Yes |
| Per-Org API Keys | No | Partial | Yes |
| Audit/Activity Logs | Partial | Yes | Yes |
| User Blocking / Suspension | Yes | Yes | Partial |
| Developer Experience | |||
| Simple REST API (no SDK required) | Yes | Partial | Yes |
| Official Client SDKs | Yes | Yes | No |
| Custom Email Templates | Yes | Yes | Partial |
| Webhooks / Event Callbacks | Yes | Yes | Partial |
| Integrated Database (PostgreSQL) Supabase Auth is tightly integrated with its Postgres database | Yes | No | No |
| Self-Hosted Option | Yes | No | No |
| API Documentation | Yes | Yes | Yes |
| Pricing & Flexibility | |||
| Free Tier Available | Yes | Yes | Yes |
| Predictable Flat-Rate Pricing | Partial | No | Yes |
| Pay-Per-MAU Model | Partial | Yes | No |
| Low Vendor Lock-In Supabase open source reduces lock-in, but its auth is coupled to its Postgres stack | Partial | Partial | Yes |
| Low Setup Complexity | Partial | No | Yes |
| Auth-Only (no database required) Supabase can be used for auth only but is designed as a full backend platform | Partial | Yes | Yes |
Best for teams that want an open-source, self-hostable backend. Supabase Auth is powerful and ships with social login, magic links, and deep Postgres integration. Ideal when you're already using Supabase as your database.
The most comprehensive feature set — SAML, OIDC, enterprise SSO, and deep customization. The go-to for large teams with complex compliance requirements. Pricing escalates sharply with monthly active users.
The right choice when you need focused, reliable email/password authentication with strong security (RS512 JWT, 2FA, RBAC) and no platform lock-in. Simple REST API, flat predictable pricing, and minimal setup.