head to head · open source
Logto vs cas
Logto has 14,843 GitHub stars, 1,212 forks, 183 open issues and last shipped today. cas has 11,394 stars, 3,955 forks, 17 open issues and last shipped today. Logto leads on adoption by 30% (14,843 vs 11,394 stars). Logto is written in TypeScript under MPL-2.0; cas is written in Java under Apache-2.0. Logto has attracted 8% as many forks as stars, cas 35%. Logto was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 4 topic tags (authentication, authorization, mfa, oauth2), 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
| Logto | cas | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 11K |
| License | MPL-2.0 | Apache-2.0 |
| Written in | TypeScript | Java |
| Last push | 2026-11-05 | 2026-11-05 |
| Forks | ⑂ 1.2K | ⑂ 4.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Logto if
- You weight community size — 15K stars and counting
- You want the MPL-2.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick cas if
- You want the cas feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and cas fits your workflow better
About Logto
Logto Logto is the modern, open source auth infrastructure for SaaS and AI apps. It takes the pain out of OIDC and OAuth 2.1 and makes it easy to build secure, production ready auth with multi tenancy, enterprise SSO, and RBAC. website • cloud • docs • api • blog • auth wiki • newsletter Why Logto? Built for teams scaling SaaS, AI, and agent based platforms without the usual auth headaches. With Logto, you get: Multi tenancy, enterprise SSO, and RBAC : ready to use, no workarounds. Pre built sign in flows , customizable UIs, and SDKs for 30+ frameworks. Full support for OIDC, OAuth 2.1, and SAML without the…
read the full Logto overview →
About cas
Central Authentication Service (CAS) [ ][casslack] [ ][cassupport] Introduction Welcome to the home of the [Central Authentication Service project][apereocas], more commonly referred to as CAS. CAS is an enterprise multilingual identity provider and single sign on solution for the web and attempts to be a comprehensive platform for your authentication and authorization needs. CAS is an open and well documented authentication protocol. The primary implementation of the protocol is an open source Java server component by the same name hosted here, with support for a plethora of additional authentication protocols…
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Frequently asked questions
Is Logto or cas more popular?
Logto has 14,843 GitHub stars and cas has 11,394. Logto has the larger community by that measure.
Are Logto and cas free?
Both are open source. Logto is licensed under MPL-2.0 and cas under Apache-2.0. Neither carries a licence fee.
What is the difference between Logto and cas?
Logto is written in TypeScript and cas 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, Logto or cas?
Choose Logto if you want the larger community (14,843 stars) or its MPL-2.0 licence terms. Choose cas if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.