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← Auth0

Alternatives

Auth0 alternatives

Auth0 provides scalable authentication and authorization for apps, APIs, and AI agents. Here are 22 similar tools on DevHunt, starting with the closest matches.

Quick answerThe best free Auth0 alternative is Keycloak, for enterprise-grade managed identity. Pick Firebase for full-stack app backend with auth, or Appwrite for self-hosted backend with auth.

Looking for something free? Free and open-source Auth0 alternatives →

At a glance

4 closest to Auth0
ToolBest forPricingVotesComparison
FirebaseFull-stack app backend with authPaid—vs Auth0 →
AppwriteSelf-hosted backend with authPaid, open source—vs Auth0 →
SupabasePostgres-centric backend with authPaid, open source—vs Auth0 →
KeycloakEnterprise-grade managed identityFree, open source—vs Auth0 →

How to choose

  • For full-stack app backend with auth: Firebase (paid)
  • For self-hosted backend with auth: Appwrite (paid, open source)
  • For Postgres-centric backend with auth: Supabase (paid, open source)
  • For enterprise-grade managed identity: Keycloak (free, open source)
  • For unified identity platform for apps and AI agents: Auth0 itself

Closest alternatives

compared with Auth0
  • Firebase▲ 0 · Subscription

    Firebase provides a broader backend (database, hosting) while Auth0 focuses on identity only. Auth0 vs Firebase →

  • Appwrite▲ 0 · Subscription

    Appwrite is open-source and self-hosted, whereas Auth0 is a managed SaaS service. Auth0 vs Appwrite →

  • Supabase▲ 0 · Subscription

    Supabase offers Postgres-based backend plus auth; Auth0 offers deeper enterprise features and AI-agent support. Auth0 vs Supabase →

  • Keycloak▲ 0 · Free

    Keycloak is open-source and self-managed, Auth0 provides managed cloud with extensive AI-agent capabilities. Auth0 vs Keycloak →

More Auth tools

most upvoted on DevHunt
  1. 1CorbadoCorbado · Passkey-first authentication for React, Next.js, Flutter & more !73
  2. 2ClerkClerk · The most comprehensive User Management Platform61
  3. 3RapidstackinRapidstackin · 🚀 Kickstart your SaaS project with Nuxt 3, Supabase, Stripe, and Resend! Authentication, payments, and more ready to go.4
  4. +your ad here · $99/weekopen spot
  5. 4Melody AuthMelody Auth · Opensource auth/oauth system3
  6. 5Easy AuthEasy Auth · authentication made easy for devs2
  7. 6HMDIA Login & Registration PluginHMDIA Login & Registration Plugin · Customize WordPress login, registration and account pages with HMDIA.1
  8. 7IssuerdIssuerd · Fast, Keycloak-compatible IAM with DPoP and CIBA1
  9. 8Emails for SupabaseEmails for Supabase · A free tool that turns Supabase's default auth emails into branded, production-ready templates.1
  10. 9Microsoft Entra IDMicrosoft Entra ID · Identity and access management from Microsoft0
  11. 10KindeKinde · Auth, feature flags and billing for SaaS0
  12. 11Big Into EnergyBig Into Energy · Professional Labubu Authentication Platform0
  13. +your ad here · $99/weekopen spot
  14. 12OktaOkta · Workforce and customer identity and access management0
  15. 13SSOJetSSOJet · Add Enterprise SSO Without Rebuilding Your Auth0
  16. 14authentikauthentik · Open-source identity provider and SSO0
  17. 15Better AuthBetter Auth · Open-source authentication framework for TypeScript0
  18. 16ZitadelZitadel · Open-source identity infrastructure with SSO and multi-tenancy0
  19. 17WorkOSWorkOS · Enterprise SSO, directory sync and auth APIs0
  20. 18SuperTokensSuperTokens · Open-source authentication for web and mobile apps0

FAQ

What is the best alternative to Auth0?+

The closest Auth0 alternatives are Firebase (full-stack app backend with auth), Appwrite (self-hosted backend with auth) and Supabase (Postgres-centric backend with auth). Keycloak is also close. Each one links to a side-by-side comparison with Auth0.

What is the best free alternative to Auth0?+

Keycloak (enterprise-grade managed identity) is the closest free alternative to Auth0.

Is there an open source alternative to Auth0?+

Yes. Appwrite (self-hosted backend with auth), Supabase (Postgres-centric backend with auth) and Keycloak (enterprise-grade managed identity) are open source.

What is Auth0 used for?+

Auth0 provides scalable authentication and authorization for apps, APIs, and AI agents. Common uses: add passwordless and social login to a consumer web app to boost conversion, secure AI agents with verifiable identities and controlled access to data sources and implement enterprise SSO and SCIM for a multi-tenant SaaS platform.

Is Auth0 free?+

Auth0 has a free tier and paid plans, with a free trial.