Ory Hydra 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.
| Feature | Ory Hydra | 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 | Apache-2.0 | Apache-2.0 |
| Language | Go | Java |
| Setup difficulty | Hard | Hard |
| Min. RAM | 256 MB | 4,096 MB |
| Deployment | docker, kubernetes, binary | docker, kubernetes, bare-metal |
| GitHub stars | ★ 17,563 | ★ 880 |
| First released | 2015 | 2007 |
| Replaces | Okta, Auth0 | Okta, ForgeRock |
What are Ory Hydra and WSO2 Identity Server?
Ory Hydra
Ory Hydra is an OpenID Certified OAuth 2.0 and OpenID Connect provider. It is built to integrate with any existing identity system and issues tokens without managing user accounts itself.
- OpenID Certified implementation
- Low memory footprint
- Bring your own login and consent UI
- Scales horizontally
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
Ory Hydra vs WSO2 Identity Server: key differences
Ory Hydra is written in Go, while WSO2 Identity Server is built with Java. Ory Hydra 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 Ory Hydra arrived in 2015. Ory Hydra has the considerably larger community, at 17,563 GitHub stars versus 880.
Why pick each one
Choose Ory Hydra if…
- Security focused and certified
- Integrates with any user store
Watch out for
- Only handles OAuth, not user management
Choose WSO2 Identity Server if…
- Enterprise feature set
- Strong standards coverage
Watch out for
- Resource heavy
- Complex tuning
Frequently asked questions
Is Ory Hydra or WSO2 Identity Server better?
Neither is universally better. Ory Hydra has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Ory Hydra and WSO2 Identity Server free and open-source?
Yes. Ory Hydra is licensed under Apache-2.0 and WSO2 Identity Server under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Ory Hydra and WSO2 Identity Server with Docker?
Ory Hydra: yes. WSO2 Identity Server: yes.
Which is lighter on resources, Ory Hydra or WSO2 Identity Server?
Ory Hydra 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.