Auth0 alternatives: 7 apps ranked by verified data
Common reasons people leave Auth0: costs rise sharply once you need B2B or enterprise features, and cloud only for most customers; no self-hosted edition. We ranked 7 alternatives by how directly each one replaces Auth0, then by reviews, real visits and how recently each app's facts were checked against its own website. Clerk currently ranks first.
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Show all 7 alternativesThe best Auth0 alternative for…
The highest-ranked app in this list for each need.
Best Auth0 alternative for most people
ClerkFaster to drop into React and Next.js apps, with prebuilt UI components and a larger free tier.
Best Auth0 alternative for a free option
KeycloakFree, self-hosted and standards-based, for teams that would rather run identity themselves.
Best Auth0 alternative for a free plan you can upgrade
WorkOSBetter fit for B2B SaaS that mainly needs enterprise SSO and SCIM, with a free first million users.
Best Auth0 alternative for open source
ZitadelOpen-source alternative with cloud or self-hosting and multi-tenancy built in.
Best Auth0 alternative for self-hosting
FusionAuthSimilar feature set with a free self-hosted Community edition and no per-user cloud lock-in.
Best Auth0 alternative for Mac
KeycloakFree, self-hosted and standards-based, for teams that would rather run identity themselves.
Best Auth0 alternative for Windows
KeycloakFree, self-hosted and standards-based, for teams that would rather run identity themselves.
Best Auth0 alternative for Linux
KeycloakFree, self-hosted and standards-based, for teams that would rather run identity themselves.
Best Auth0 alternative for iPhone and Android
Amazon CognitoCheaper per user for teams already on AWS, at the cost of a rougher developer experience.
Best Auth0 alternative for working in the browser
FirebaseSimpler and cheaper for mobile and web apps already using Firebase services.
Auth0 alternatives: common questions
What is the best alternative to Auth0?
Clerk ranks first right now. Faster to drop into React and Next.js apps, with prebuilt UI components and a larger free tier. WorkOS and Keycloak follow it in our ranking.
Is there a free alternative to Auth0?
Yes. Clerk (free plan + paid), WorkOS (free plan + paid), Keycloak (open source) and FusionAuth (free plan + paid) have a free option. Check each app's verified facts for current plan limits.
Is there an open-source alternative to Auth0?
Yes: Keycloak and Zitadel. Keycloak and Zitadel can also be self-hosted.
Which Auth0 alternatives work on Linux?
Keycloak and FusionAuth run on Linux.
Why do people switch from Auth0?
The complaints we hear most: costs rise sharply once you need B2B or enterprise features; cloud only for most customers; no self-hosted edition; dashboard and docs can be confusing alongside Okta's own products.
How is this list ranked?
Every app is scored with the same published formula: how directly it replaces Auth0, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.