Authentik vs Stack Auth

Comparing two open source alternatives to Auth0 . Use the comparison below to decide which one fits your needs.

Authentik

Open source identity provider and SSO solution that replaces Auth0 and Okta with a self-hostable, flexible authentication platform.

AGPL-3.0

Open-source authentication platform for Next.js and React, built as an alternative to Auth0 and Clerk.

	Authentik	Stack Auth
License	—	AGPL-3.0
Self-hostable	Yes	Yes
GitHub Stars	22,114	6,812
Forks	1,665	519
Open Issues	1,216	37
Last Commit	Jun 23, 2026	Jun 20, 2026
First Released	Dec 30, 2019	Feb 28, 2024
Categories	2FA Authentication	Authentication & Identity
Tags	—	#authentication #self hosted #privacy #security #nodejs

Open-source identity and access management with SSO, OAuth2, OIDC, and SAML support for modern applications.

Open-source authentication solution, an alternative to Auth0 and Firebase Auth that you can self-host.