Compare software

Apereo CASZitadel
Free

Free and open source.

 Freemium

Open source for self-hosting, with a hosted service that has a free starting plan and paid…

Self-hosted Web, Self-hosted
  • Supports CAS, SAML, OAuth and OpenID Connect
  • Many deployment options including Docker and Kubernetes
  • Self-hostable, with deployment documentation
  • Built-in MFA, passwordless and social login
  • Complex to deploy and configure for small setups
  • Requires Java servlet and build tooling knowledge
  • Aimed at developers integrating identity into applications
  • Running it yourself means operating an identity service
Self-hosted Self-hosted, Hosted service
Open source Open source
License not stated License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.