Compare tools side by side · TechInTrends

CNCF open-source identity and access management server with SSO, OIDC, SAML and user federation.

Hosted auth and user management with drop-in UI components, popular in the Next.js ecosystem.

Self-hosted identity provider with flows, SSO (OIDC/SAML/LDAP) and an app proxy; homelab and enterprise favorite.

Cloud-native, multi-tenant identity platform with OIDC, SAML, passkeys and an event-sourced core.

Head to head

Metric	Keycloak	Clerk	authentik	Zitadel
Stars	37.7k	n/a	26.3k	15.5k
Weekly downloads	n/a	3.6M	n/a	n/a
Download growth	n/a	+49%	n/a	n/a
Popularity score	84/100	80/100	81/100	77/100
Forks	9.1k	n/a	2.1k	1.4k
Open issues	3.4k	n/a	911	1.4k
Last commit	1w ago	n/a	3d ago	1w ago
Latest version	n/a	7.9.25	n/a	n/a
License	Apache-2.0	n/a	n/a	AGPL-3.0
First released	2013	n/a	2019	2020
Signals	Popular	None	Trending	Rising
Listed in	Backend › Authentication Libraries Security & Identity › Identity providers & SSO	Backend › Authentication Libraries Security & Identity › Identity providers & SSO	Security & Identity › Identity providers & SSO	Security & Identity › Identity providers & SSO

Weekly downloads over time

Hover for exact values; switch to log scale for tools of very different sizes. Not shown (no comparable download data): Keycloak, authentik, Zitadel.