7 Best Auth0 Alternatives for Developers (2026)
Auth0 is fine — until the bill hits at scale, you're told you must self-host for compliance, or you realize you'd rather own the code than rent access to it. The best Auth0 alternatives in 2026 give you real choices: modern hosted services, open-source options you control, and boilerplates where authentication is yours permanently. Here's the honest breakdown.
Quick Answer
The best Auth0 alternatives in 2026 are Clerk (modern React DX), Supabase Auth (open-source, bundled with a database), Firebase Auth (Google ecosystem), Keycloak (self-hosted enterprise), SuperTokens (open-source, self-hostable), WorkOS (enterprise SSO), and own-your-auth boilerplates if you would rather not rent authentication. Pick a managed provider for speed, or a self-hosted/owned option for control and no per-user fees.
How we chose
We weighted four things developers actually care about when leaving Auth0: hosting model (managed vs self-hosted vs owned), developer experience, pricing model, and lock-in. An "Auth0 alternative" here is any service or codebase that handles authentication instead of Auth0.
The 7 alternatives
Clerk — native React/Next.js components and great DX. Best for product teams that want drop-in UI. Usage-based pricing. See Auth0 vs Clerk.
Supabase Auth — open-source auth bundled with a Postgres database. Best if you also want a hosted database.
Firebase Auth — mature, managed, deep Google integration. Best for mobile/real-time apps in Google's stack.
Keycloak — self-hosted, enterprise-grade, supports SAML/OIDC. Best when you must self-host for compliance.
SuperTokens — open-source and self-hostable with a managed option. Best for teams wanting control without building from scratch.
WorkOS — enterprise SSO/SCIM as a service. Best for adding enterprise readiness to an existing app.
Own your auth (boilerplate) — skip providers entirely and own the code. Best when you want zero per-user fees and full control.
Comparison table
Option | Hosting | Best for | Pricing model |
|---|---|---|---|
Clerk | Managed | React/Next.js DX | Per MAU |
Supabase Auth | Managed/self-host | Auth + database | Usage |
Firebase Auth | Managed | Google ecosystem | Per use |
Keycloak | Self-hosted | Enterprise, compliance | Free (you host) |
SuperTokens | Self-host/managed | Control + speed | Free / usage |
WorkOS | Managed | Enterprise SSO | Per connection |
Own it (FastStaq) | Your infra | No fees, full control | One-time (boilerplate) |
(Pricing models change — verify current details with each vendor.)
How to choose
Want speed and don't mind per-user fees? A managed provider (Clerk, Supabase Auth, Firebase Auth, WorkOS).
Must self-host for compliance? Keycloak or SuperTokens.
Want no per-user fees and full ownership? Own your auth in a boilerplate.
Here's the thing: the provider vs ownership tradeoff is permanent. Once your users are in a managed provider, migrating them out is painful. Make that call consciously.
FastStaq is the own-it option: it ships OAuth, sessions, magic links, two-factor authentication, and role-based access control in your codebase, with no per-MAU fee. It's not a managed provider — it's the alternative to renting one.
Frequently asked questions
What is the best free Auth0 alternative? For self-hosting, Keycloak or SuperTokens; for owning the code, a boilerplate with built-in auth.
Is there an open-source Auth0 alternative? Yes — Keycloak, SuperTokens, and Supabase Auth are open source.
Why leave Auth0? Usually cost at scale, lock-in, or a desire to self-host or own the code.
