head to head · open source
oauth2-client vs phpCAS
oauth2-client has 3,820 GitHub stars, 767 forks, 64 open issues and last shipped 22 days ago. phpCAS has 800 stars, 419 forks, 29 open issues and last shipped 3 months ago. oauth2-client leads on adoption by 378% (3,820 vs 800 stars). oauth2-client is written in PHP under MIT; phpCAS is written in PHP under Apache-2.0. oauth2-client has attracted 20% as many forks as stars, phpCAS 52%. 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, php, 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 | phpCAS | |
|---|---|---|
| GitHub stars | ★ 3.8K | ★ 800 |
| License | MIT | Apache-2.0 |
| Written in | PHP | PHP |
| Last push | 2026-09-16 | 2026-06-30 |
| Forks | ⑂ 767 | ⑂ 419 |
| 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 phpCAS if
- You want the phpCAS feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches PHP
- You evaluated both and phpCAS fits your workflow better
About oauth2-client
league/oauth2 client is an MIT licensed PHP library maintained by The PHP League that provides a reusable base for integrating applications with any OAuth 2.0 service provider, aimed at PHP developers who need to add "Connect with Facebook/Google" style login and token flows without implementing RFC 6749 from scratch.
read the full oauth2-client overview →
About phpCAS
phpCAS is a PHP authentication library for application developers who need to sign users in through a Central Authentication Service (CAS) server as part of a single sign on setup.
read the full phpCAS overview →
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Frequently asked questions
Is oauth2-client or phpCAS more popular?
oauth2-client has 3,820 GitHub stars and phpCAS has 800. oauth2-client has the larger community by that measure.
Are oauth2-client and phpCAS free?
Both are open source. oauth2-client is licensed under MIT and phpCAS under Apache-2.0. Neither carries a licence fee.
What is the difference between oauth2-client and phpCAS?
oauth2-client is written in PHP and phpCAS in PHP. 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 phpCAS?
Choose oauth2-client if you want the larger community (3,820 stars) or its MIT licence terms. Choose phpCAS if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.