6 self-hosted options
Open-source alternatives to Auth0
The best open-source alternatives to Auth0 are Keycloak, authentik and ZITADEL.
About Auth0: An identity platform offering login, single sign-on and user management as a service.
Every option below is free to self-host and ranked by GitHub stars, so you can move off Auth0 without giving up the features you rely on.
Top picks
- Rank 1:
Keycloak
keycloak/keycloak
Open-source identity and access management with SSO, OIDC, SAML and user federation.
Identity & SSOJavaDocker - Rank 2:
authentik
goauthentik/authentik
Flexible identity provider and SSO platform with OAuth2, SAML, LDAP and proxy outposts.
Identity & SSOPythonDocker - Rank 3:
ZITADEL
zitadel/zitadel
Identity infrastructure with SSO, passkeys, multi-tenancy and audit trails, built in Go.
Identity & SSOGoDocker
Why switch
Why teams move off Auth0
Self-hosting is not only about saving money. These are the reasons people make the switch.
Own your data
Your data lives on a server you control, not on Auth0's infrastructure. No surprise policy changes and no lock-in.
No per-seat pricing
Open-source alternatives to Auth0 are free to run for as many users as your server can handle. A small VPS often costs less than a single subscription.
Customize and extend
Read the code, add plugins, connect it to your own tools and automate it through open APIs. When you need a feature, you can build it or fund it.
Full ranking
All 6 Auth0 alternatives
Ranked by GitHub stars. Open any app for live stats, license details and a deploy option.
- 1
Keycloak
Open-source identity and access management with SSO, OIDC, SAML and user federation.
Identity & SSODocker - 2
authentik
Flexible identity provider and SSO platform with OAuth2, SAML, LDAP and proxy outposts.
Identity & SSODocker - 3
ZITADEL
Identity infrastructure with SSO, passkeys, multi-tenancy and audit trails, built in Go.
Identity & SSODocker - 4
Authelia
Single sign-on and two-factor authentication portal for protecting web apps behind a reverse proxy.
Identity & SSODocker - 5
Ory Kratos
Headless identity and user management API with login, registration and account recovery.
Identity & SSODocker - 6
Logto
Modern auth infrastructure with OIDC, SSO and multi-tenant support for SaaS and apps.
Identity & SSODocker
What is the best open-source alternative to Auth0?
Keycloak is the most popular open-source alternative to Auth0, with 37,156 GitHub stars. authentik and ZITADEL are also strong choices. Compare features, license and recent activity to find the best fit for your team.
Is there a free alternative to Auth0?
Yes. All 6 apps on this page are open source and free to self-host, so you can run a Auth0 replacement without per-user fees. You only pay for the server, and a small VPS is usually enough for personal use or a small team.
Can I self-host an alternative to Auth0?
Yes. Keycloak, authentik and ZITADEL ship a Docker image, so you can run them on a home server or VPS with Docker Compose in a few minutes. Your data then stays on hardware you control.
How do I migrate from Auth0?
Start by exporting your data from Auth0, then check the import options of the app you pick, since many projects ship importers for popular formats. Run both side by side for a week before you switch so nothing is lost.