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6 self-hosted options

Open-source alternatives to Auth0

The best open-source alternative to Auth0 is Keycloak (Apache-2.0, 37,517 GitHub stars, Docker image). Authelia stands out for a permissive Apache-2.0 license, and authentik stands out for the most commits in the last 12 months (5,305).

About Auth0: An identity platform offering login, single sign-on and user management as a service.

Updated · data from GitHub, refreshed daily

Top picks

  1. Rank 1:

    Keycloak

    keycloak/keycloak

    Open-source identity and access management with SSO, OIDC, SAML and user federation.

    Active · last commit Oct 26, 2026

    Identity & SSOJavaDocker

    Stands out for the most GitHub stars.

  2. Rank 2:

    Authelia

    authelia/authelia

    Single sign-on and two-factor authentication portal for protecting web apps behind a reverse proxy.

    Active · last commit Oct 25, 2026

    Identity & SSOGoDocker

    Stands out for a permissive Apache-2.0 license.

  3. Rank 3:

    authentik

    goauthentik/authentik

    Flexible identity provider and SSO platform with OAuth2, SAML, LDAP and proxy outposts.

    Active · last commit Oct 26, 2026

    Identity & SSOPythonDocker

    Stands out for the most commits in the last 12 months (5,305).

At a glance

Auth0 alternatives compared

Open-source apps come first, then source-available ones and apps whose license appsgit could not verify; within each group, projects with at least 12 commits in the last 12 months come before less active or archived ones, then by GitHub stars.

Auth0 alternatives compared, data as of 2026-10-26
AppStands out forLicenseGitHub starsCommits (12 mo)Last commitDocker image
Keycloakthe most GitHub starsApache-2.037,5173,217Oct 26, 2026Yes
Autheliaa permissive Apache-2.0 licenseApache-2.029,4122,537Oct 25, 2026Yes
authentikthe most commits in the last 12 months (5,305)MIT26,1015,305Oct 26, 2026Yes
ZITADELthe most recent release (v4.20.0, October 2026)AGPL-3.015,437611Oct 23, 2026Yes
Logtoits TypeScript codebaseMPL-2.014,7931,395Oct 26, 2026Yes
Ory Kratos–Apache-2.013,937389Jul 29, 2026Yes

Full list

All 6 Auth0 alternatives

Open any app for live stats, license details and a deploy option.

  1. 1

    Keycloak

    Open-source identity and access management with SSO, OIDC, SAML and user federation.

    Stands out for the most GitHub stars. Keycloak has 37,517 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 3,217 commits in the last year.

  2. 2

    Authelia

    Single sign-on and two-factor authentication portal for protecting web apps behind a reverse proxy.

    Stands out for a permissive Apache-2.0 license. Authelia has 29,412 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 2,537 commits in the last year.

  3. 3

    authentik

    Flexible identity provider and SSO platform with OAuth2, SAML, LDAP and proxy outposts.

    Stands out for the most commits in the last 12 months (5,305). authentik has 26,101 GitHub stars, uses the MIT license, ships a Docker image and had 5,305 commits in the last year.

  4. 4

    ZITADEL

    Identity infrastructure with SSO, passkeys, multi-tenancy and audit trails, built in Go.

    Stands out for the most recent release (v4.20.0, October 2026). ZITADEL has 15,437 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 611 commits in the last year.

  5. 5

    Logto

    Modern auth infrastructure with OIDC, SSO and multi-tenant support for SaaS and apps.

    Stands out for its TypeScript codebase. Logto has 14,793 GitHub stars, uses the MPL-2.0 license, ships a Docker image and had 1,395 commits in the last year.

  6. 6

    Ory Kratos

    Headless identity and user management API with login, registration and account recovery.

    Ory Kratos has 13,937 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 389 commits in the last year.

FAQ

Auth0 alternatives: FAQ

Still curious? Email info@appsgit.com.

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 replace Auth0 without per-user fees. You pay only for the server.

Can I self-host an alternative to Auth0 with Docker?

Yes. All 6 apps here publish a Docker image, including Keycloak, Authelia and authentik, so you can run them on a home server or VPS with Docker Compose.

Which Auth0 alternative is the most actively developed?

authentik (MIT), with 5,305 commits in the last 12 months. Activity is a good sign that bugs and security issues get fixed.

How is this list ranked?

Open-source apps come first, then source-available ones and apps whose license appsgit could not verify; within each group, projects with at least 12 commits in the last 12 months come before less active or archived ones, then by GitHub stars.