Authentik vs Stack Auth

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

Authentik

MIT

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

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Stack Auth

AGPL-3.0

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

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Side-by-side comparison

	Authentik	Stack Auth
License	MIT	AGPL-3.0
Self-hostable	Yes	Yes
GitHub Stars	25,906	6,861
Forks	2,064	524
Open Issues	1,112	87
Last Commit	Oct 10, 2026	Oct 10, 2026
First Released	Dec 30, 2019	Feb 28, 2024
Categories	2FA Authentication Single Sign-On	Authentication & Identity
Tags	#authentication #authorization #kubernetes #self hosted #sso	#authentication #self hosted #privacy #security #nodejs

GitHub stars over time

Authentik25,906

Stack Auth

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