head to head · open source
oauth2-proxy vs xxl-sso
oauth2-proxy has 15,365 GitHub stars, 2,265 forks, 285 open issues and last shipped 5 days ago. xxl-sso has 2,010 stars, 829 forks, 2 open issues and last shipped 1 months ago. oauth2-proxy leads on adoption by 664% (15,365 vs 2,010 stars). oauth2-proxy is written in Go under MIT; xxl-sso is written in Java under GPL-3.0. oauth2-proxy has attracted 15% as many forks as stars, xxl-sso 41%. oauth2-proxy was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (sso), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 20902 open source comparisons
Side by side
| oauth2-proxy | xxl-sso | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 2.0K |
| License | MIT | GPL-3.0 |
| Written in | Go | Java |
| Last push | 2026-11-08 | 2026-10-13 |
| Forks | ⑂ 2.3K | ⑂ 829 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick oauth2-proxy if
- You weight community size — 15K stars and counting
- You want the MIT license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick xxl-sso if
- You want the xxl-sso feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Java
- You evaluated both and xxl-sso fits your workflow better
About oauth2-proxy
OAuth2 Proxy is a flexible, open source tool that can act as either a standalone reverse proxy or a middleware component integrated into existing reverse proxy or load balancer setups. It provides a simple and secure way to protect your web applications with OAuth2 / OIDC authentication. As a reverse proxy, it intercepts requests to your application and redirects users to an OAuth2 provider for authentication. As a middleware, it can be seamlessly integrated into your existing infrastructure to handle authentication for multiple applications. OAuth2 Proxy supports a lot of OAuth2 as well as OIDC providers…
read the full oauth2-proxy overview →
About xxl-sso
XXL SSO XXL SSO, A Distributed Single Sign On Framework. Home Page Introduction XXL SSO is a single sign on framework that allows you to access all trusted applications with just one login. It has "lightweight, highly scalable, progressive" and other features, supports "login authentication, permissions (role) authentication, distributed session authentication, single sign on, Web login, Native(front end separation) login" and other multi login and authentication types. Now, it's already open source code, real "out of the box". XXL SSO 是一个 单点登录框架，只需要登录一次就可以访问所有相互信任的应用系统。具备 “轻量级、高扩展、渐进式” 的等特性，支持…
read the full xxl-sso overview →
More in Security & Privacy
Related comparisons
More Identity & Access Management (IAM) projects
Compare either of these against the rest of the Identity & Access Management (IAM) field.
Frequently asked questions
Is oauth2-proxy or xxl-sso more popular?
oauth2-proxy has 15,365 GitHub stars and xxl-sso has 2,010. oauth2-proxy has the larger community by that measure.
Are oauth2-proxy and xxl-sso free?
Both are open source. oauth2-proxy is licensed under MIT and xxl-sso under GPL-3.0. Neither carries a licence fee.
What is the difference between oauth2-proxy and xxl-sso?
oauth2-proxy is written in Go and xxl-sso in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, oauth2-proxy or xxl-sso?
Choose oauth2-proxy if you want the larger community (15,365 stars) or its MIT licence terms. Choose xxl-sso if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.