Casdoor vs Rauthy
A side-by-side comparison of two self-hosted identity & sso options — licensing, setup difficulty, resource needs, and what each one replaces.
Rauthy
Lightweight OpenID Connect provider written in Rust
| Feature | Casdoor | Rauthy |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 94 · Excellent | 84 · Excellent |
| Category | Identity & SSO | Identity & SSO |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Rust |
| Setup difficulty | Medium | Medium |
| Min. RAM | 256 MB | 128 MB |
| Deployment | docker, kubernetes, binary | docker, binary |
| GitHub stars | ★ 14,465 | ★ 1,339 |
| First released | 2021 | 2023 |
| Replaces | Auth0, Okta | Keycloak, Auth0 |
What are Casdoor and Rauthy?
Casdoor
Casdoor is an open-source identity and access management platform with a strong focus on a friendly user interface. It supports OAuth2, OIDC, SAML, CAS, LDAP and many social login providers.
- Supports OAuth, SAML, CAS and LDAP
- Dozens of built-in social login providers
- Multi-tenant organization support
- Web-based admin and login UI
Rauthy
Rauthy is an open-source, security-focused OpenID Connect provider and single sign-on solution written in Rust. It is designed to be lightweight and fully self-hosted with minimal resource usage.
- Lightweight OIDC provider
- Passkey support
- Low memory footprint
- Single binary option
Casdoor vs Rauthy: key differences
Casdoor is written in Go, while Rauthy is built with Rust. Rauthy is the lighter option, starting around 128 MB of RAM against 256 MB for Casdoor. Casdoor is the more established project (first released 2021), while Rauthy arrived in 2023. Casdoor has the considerably larger community, at 14,465 GitHub stars versus 1,339.
Why pick each one
Choose Casdoor if…
- Polished out-of-the-box UI
- Broad protocol support
Watch out for
- Documentation can be uneven
Choose Rauthy if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Active community (1.3k GitHub stars)
- Written in Rust
Frequently asked questions
Is Casdoor or Rauthy better?
Neither is universally better. Casdoor has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Casdoor and Rauthy free and open-source?
Yes. Casdoor is licensed under Apache-2.0 and Rauthy under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Casdoor and Rauthy with Docker?
Casdoor: yes. Rauthy: yes.
Which is lighter on resources, Casdoor or Rauthy?
Rauthy has the smaller minimum footprint at 128 MB of RAM, compared to about 256 MB for Casdoor. Real-world usage depends on library size, user count, and enabled features.