Authentik leads in popularity with 24,195 stars vs 14,681 stars for Zitadel. The 65% higher star count indicates stronger community adoption. In terms of developer contributions, Authentik has 1,851 forks, indicating strong developer engagement.

Both projects show recent activity, with Authentik last updated 5 hours ago and Zitadel 2 days ago.

Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript, JSX, Golang. However, they differ in their additional technology choices: Authentik uses Python, Rust, Django while Zitadel leverages Next.js, SCSS, Lua.

Both projects started around the same time, with Authentik beginning 7 years ago and Zitadel 6 years ago.

Zitadel is licensed under AGPL-3.0, while Authentik's license terms are not publicly specified.

Both tools serve similar use cases in Authentication & SSO, Authorization & Permissions.

Both Authentik and Zitadel offer self-hosting capabilities, giving you full control over your data and infrastructure.