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 | Fully supported | Fully supported | Fully supported |
| Magic Links / Passwordless | Fully supported | Fully supported | Not supported |
| Anonymous Authentication | Partial / limited | Not supported | Not supported |
| Security | |||
| JWT Token Management | Fully supported | Fully supported | Fully supported |
| RS512 Key-Pair Signing | Partial / limited | Fully supported | Fully supported |
| Two-Factor Authentication (2FA) | Fully supported | Fully supported | Fully supported |
| TOTP Authenticator App (Google Auth, Authy) | Fully supported | Fully supported | Fully supported |
| 2FA Backup Codes | Partial / limited | Fully supported | Fully supported |
| 2FA via Email OTP | Partial / limited | Fully supported | Fully supported |
| Rate Limiting | Fully supported | Fully supported | Fully supported |
| Email Verification | Fully supported | Fully supported | Fully supported |
| Password Reset / Forgot Password | Fully supported | Fully supported | Fully supported |
| Password Complexity Enforcement | Fully supported | Fully supported | Fully supported |
| User & Org Management | |||
| User Management Dashboard | Fully supported | Fully supported | Fully supported |
| Role-Based Access Control (RBAC) Supabase uses Row-Level Security (RLS) policies in Postgres | Fully supported | Fully supported | Fully supported |
| Per-Org API Keys | Not supported | Partial / limited | Fully supported |
| Audit/Activity Logs | Partial / limited | Fully supported | Fully supported |
| User Blocking / Suspension | Fully supported | Fully supported | Partial / limited |
| Developer Experience | |||
| Simple REST API (no SDK required) | Fully supported | Partial / limited | Fully supported |
| Official Client SDKs | Fully supported | Fully supported | Not supported |
| Custom Email Templates | Fully supported | Fully supported | Partial / limited |
| Webhooks / Event Callbacks | Fully supported | Fully supported | Partial / limited |
| Integrated Database (PostgreSQL) Supabase Auth is tightly integrated with its Postgres database | Fully supported | Not supported | Not supported |
| Self-Hosted Option | Fully supported | Not supported | Not supported |
| API Documentation | Fully supported | Fully supported | Fully supported |
| Pricing & Flexibility | |||
| Free Tier Available | Fully supported | Fully supported | Fully supported |
| Predictable Flat-Rate Pricing | Partial / limited | Not supported | Fully supported |
| Pay-Per-MAU Model | Partial / limited | Fully supported | Not supported |
| Low Vendor Lock-In Supabase open source reduces lock-in, but its auth is coupled to its Postgres stack | Partial / limited | Partial / limited | Fully supported |
| Low Setup Complexity | Partial / limited | Not supported | Fully supported |
| Auth-Only (no database required) Supabase can be used for auth only but is designed as a full backend platform | Partial / limited | Fully supported | Fully supported |
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.