Kanidm vs WSO2 Identity Server
A side-by-side comparison of two self-hosted identity & sso options — licensing, setup difficulty, resource needs, and what each one replaces.
Kanidm
Modern, simple and secure identity management server
VS
WSO2 Identity Server
Open-source identity and access management server
| Feature | Kanidm | WSO2 Identity Server |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 90 · Excellent | 80 · Excellent |
| Category | Identity & SSO | Identity & SSO |
| License | MPL-2.0 | Apache-2.0 |
| Language | Rust | Java |
| Setup difficulty | Medium | Hard |
| Min. RAM | 256 MB | 4,096 MB |
| Deployment | docker, binary | docker, kubernetes, bare-metal |
| GitHub stars | ★ 5,404 | ★ 880 |
| First released | 2019 | 2007 |
| Replaces | Active Directory, Okta | Okta, ForgeRock |
What are Kanidm and WSO2 Identity Server?
Kanidm
Kanidm is an identity management platform written in Rust, focused on simplicity, security and correctness. It provides authentication for web applications, Unix systems and LDAP-aware services.
- OAuth2 and OpenID Connect provider
- Passkey-first authentication
- Unix and LDAP integration
- Strong security defaults
WSO2 Identity Server
WSO2 Identity Server is an open-source IAM product that provides single sign-on, identity federation, and strong authentication. It supports SAML, OpenID Connect, and adaptive authentication policies.
- Single sign-on
- Identity federation
- Adaptive authentication
- Standards support
Kanidm vs WSO2 Identity Server: key differences
Kanidm is written in Rust, while WSO2 Identity Server is built with Java. Licensing differs — MPL-2.0 for Kanidm versus Apache-2.0 for WSO2 Identity Server. Kanidm is the lighter option, starting around 256 MB of RAM against 4,096 MB for WSO2 Identity Server. WSO2 Identity Server is the more established project (first released 2007), while Kanidm arrived in 2019. Kanidm has the considerably larger community, at 5,404 GitHub stars versus 880.
Why pick each one
Choose Kanidm if…
- Memory safe and lightweight
- Excellent passwordless support
Watch out for
- Smaller ecosystem and tooling
Choose WSO2 Identity Server if…
- Enterprise feature set
- Strong standards coverage
Watch out for
- Resource heavy
- Complex tuning
Frequently asked questions
Is Kanidm or WSO2 Identity Server better?
Kanidm is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider WSO2 Identity Server if its specific feature set fits your needs better.
Are Kanidm and WSO2 Identity Server free and open-source?
Yes. Kanidm is licensed under MPL-2.0 and WSO2 Identity Server under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Kanidm and WSO2 Identity Server with Docker?
Kanidm: yes. WSO2 Identity Server: yes.
Which is lighter on resources, Kanidm or WSO2 Identity Server?
Kanidm has the smaller minimum footprint at 256 MB of RAM, compared to about 4,096 MB for WSO2 Identity Server. Real-world usage depends on library size, user count, and enabled features.