Best Open Source Alternatives to Auth0

Compare the best free and open-source alternatives to Auth0 — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 11 alternatives

Auth0

Proprietary SaaS

PricingFreemium

Platformsweb

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Auth0 alternatives compared

Open-source alternatives to Auth0, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Keycloak	37,657	Apache-2.0	LinuxDocker	Yes	Nov 2026	Visit
Better Auth	30,575	MIT	Web	No	Nov 2026	Visit
Zitadel	15,499	AGPL-3.0	LinuxDocker	Yes	Nov 2026	Visit
SuperTokens	15,340	Apache-2.0	LinuxDocker	Yes	Nov 2026	Visit
Logto	14,841	MPL-2.0	DockerLinux	Yes	Nov 2026	Visit
Hanko	9,061	AGPL-3.0	DockerLinux	Yes	Nov 2026	Visit
Stack Auth	6,884	—	DockerLinux	Yes	Nov 2026	Visit
Permify	5,968	AGPL-3.0	Web	No	Nov 2026	Visit
Cerbos	4,644	Apache-2.0	Web	No	Nov 2026	Visit
Authgear	2,140	Apache-2.0	DockerLinux	Yes	Nov 2026	Visit

Top open-source Auth0 alternatives

Keycloak37,657Apache-2.0

Keycloak is an open-source alternative to Okta and Auth0 that runs on your own infrastructure, providing self-hosted OIDC, SAML, and user federation.

LinuxDocker

vs Auth0: a free, open-source option you fully control, licensed Apache-2.0.

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Better Auth30,575MIT

Better Auth replaces Clerk with a self-hosted TypeScript authentication framework featuring native database adapters, plugins, and full schema ownership.

Web

vs Auth0: a free, open-source option you fully control, licensed MIT.

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