Apereo CAS vs ZITADEL Login UI
A side-by-side comparison of two self-hosted identity & sso options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Apereo CAS
Enterprise single sign-on server for web applications
VS
ZITADEL Login UI
Customizable login UI for the ZITADEL identity platform
| Feature | Apereo CAS | ZITADEL Login UI |
|---|---|---|
| Category | Identity & SSO | Identity & SSO |
| License | Apache-2.0 | Apache-2.0 |
| Language | Java | TypeScript |
| Setup difficulty | Hard | Medium |
| Min. RAM | 1,024 MB | 256 MB |
| Deployment | docker, kubernetes, bare-metal | docker, source |
| GitHub stars | ★ 11,354 | ★ 113 |
| First released | 2004 | 2023 |
| Replaces | Okta, Ping Identity | Auth0 Universal Login |
Why pick each one
Choose Apereo CAS if…
- Mature SSO with broad protocol support
- Widely adopted in academia
Choose ZITADEL Login UI if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Written in TypeScript
- Tiny footprint — runs in 256 MB RAM
Frequently asked questions
Is Apereo CAS or ZITADEL Login UI better?
Neither is universally better. Apereo CAS has the larger community, while ZITADEL Login UI is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Apereo CAS and ZITADEL Login UI free and open-source?
Yes. Apereo CAS is licensed under Apache-2.0 and ZITADEL Login UI under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Apereo CAS and ZITADEL Login UI with Docker?
Apereo CAS: yes. ZITADEL Login UI: yes.