head to head · open source
oauth2-proxy vs phpCAS
oauth2-proxy has 15,058 GitHub stars, 2,211 forks, 285 open issues and last shipped today. phpCAS has 800 stars, 419 forks, 29 open issues and last shipped 3 months ago. oauth2-proxy leads on adoption by 1,782% (15,058 vs 800 stars). oauth2-proxy is written in Go under MIT; phpCAS is written in PHP under Apache-2.0. oauth2-proxy has attracted 15% as many forks as stars, phpCAS 52%. 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.
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Side by side
| oauth2-proxy | phpCAS | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 800 |
| License | MIT | Apache-2.0 |
| Written in | Go | PHP |
| Last push | 2026-10-08 | 2026-06-30 |
| Forks | ⑂ 2.2K | ⑂ 419 |
| 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 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-proxy
OAuth2 Proxy is an open source, MIT licensed reverse proxy and middleware written in Go that puts OAuth2 and OpenID Connect authentication in front of web applications, aimed at operators and platform teams who need single sign on without adding auth code to every app.
read the full oauth2-proxy 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-proxy or phpCAS more popular?
oauth2-proxy has 15,058 GitHub stars and phpCAS has 800. oauth2-proxy has the larger community by that measure.
Are oauth2-proxy and phpCAS free?
Both are open source. oauth2-proxy is licensed under MIT and phpCAS under Apache-2.0. Neither carries a licence fee.
What is the difference between oauth2-proxy and phpCAS?
oauth2-proxy is written in Go 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-proxy or phpCAS?
Choose oauth2-proxy if you want the larger community (15,058 stars) or its MIT licence terms. Choose phpCAS if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.