head to head · open source
oauth2-client vs xxl-sso
oauth2-client has 3,821 GitHub stars, 772 forks, 64 open issues and last shipped 7 days ago. xxl-sso has 2,010 stars, 829 forks, 2 open issues and last shipped 1 months ago. oauth2-client leads on adoption by 90% (3,821 vs 2,010 stars). oauth2-client is written in PHP under MIT; xxl-sso is written in Java under GPL-3.0. oauth2-client has attracted 20% as many forks as stars, xxl-sso 41%. oauth2-client was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (authentication, authorization, 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.
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Side by side
| oauth2-client | xxl-sso | |
|---|---|---|
| GitHub stars | ★ 3.8K | ★ 2.0K |
| License | MIT | GPL-3.0 |
| Written in | PHP | Java |
| Last push | 2026-11-06 | 2026-10-13 |
| Forks | ⑂ 772 | ⑂ 829 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick oauth2-client if
- You weight community size — 3.8K stars and counting
- You want the MIT license terms
- Your stack matches PHP
- 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-client
OAuth 2.0 Client This package provides a base for integrating with OAuth 2.0 service providers. The OAuth 2.0 login flow, seen commonly around the web in the form of "Connect with Facebook/Google/etc." buttons, is a common integration added to web applications, but it can be tricky and tedious to do right. To help, we've created the league/oauth2 client package, which provides a base for integrating with various OAuth 2.0 providers, without overburdening your application with the concerns of RFC 6749. This OAuth 2.0 client library will work with any OAuth 2.0 provider that conforms to the OAuth 2.0 Authorization…
read the full oauth2-client 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 →
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Frequently asked questions
Is oauth2-client or xxl-sso more popular?
oauth2-client has 3,821 GitHub stars and xxl-sso has 2,010. oauth2-client has the larger community by that measure.
Are oauth2-client and xxl-sso free?
Both are open source. oauth2-client is licensed under MIT and xxl-sso under GPL-3.0. Neither carries a licence fee.
What is the difference between oauth2-client and xxl-sso?
oauth2-client is written in PHP 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-client or xxl-sso?
Choose oauth2-client if you want the larger community (3,821 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.