head to head · open source
openGym vs casdoor
openGym has 15,277 GitHub stars, 2,008 forks, 109 open issues and last shipped yesterday. casdoor has 14,643 stars, 1,866 forks, 97 open issues and last shipped 2 days ago. openGym leads on adoption by 4% (15,277 vs 14,643 stars). openGym is written in JavaScript under AGPL-3.0; casdoor is written in Go under Apache-2.0. openGym has attracted 13% as many forks as stars, casdoor 13%. openGym was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (mcp), 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
| openGym | casdoor | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 15K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | JavaScript | Go |
| Last push | 2026-10-24 | 2026-10-23 |
| Forks | ⑂ 2.0K | ⑂ 1.9K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick openGym if
- You weight community size — 15K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick casdoor if
- You want the casdoor feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and casdoor fits your workflow better
About openGym
A self hosted gym & body weight tracker you actually own. Plan your week, run guided workouts, track every set and your body weight over time — on your phone, synced across devices, behind your own passkey login. No account on someone else's server, no subscription, no ads. Just docker compose up . Home — today's workout & weight Guided workout — animated demos & sets Stats — heatmap, charts & PRs 🌐 opengym.duarte santos.ch · 📦 Source on GitHub · 🦊 GitLab mirror Screenshots, docs and the APK download live on the site. Want to poke at it first? The in browser demo is the real app with example data — no…
read the full openGym overview →
About casdoor
An open source, self hosted identity and access management platform Casdoor is a single sign on (SSO) and authentication server with a web console. It speaks OAuth 2.0 , OIDC , SAML 2.0 , CAS , LDAP , SCIM 2.0 , WebAuthn , TOTP/MFA and MCP , and connects to Google Workspace, Microsoft Entra ID (Azure AD), GitHub and many other identity providers. Website · Documentation · Live demo · Discord The sign in page your users see: password, email/SMS code, WebAuthn and Face ID, plus every social provider you enable. Admin console. Users, tokens, organizations and providers at a glance…
read the full casdoor overview →
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Frequently asked questions
Is openGym or casdoor more popular?
openGym has 15,277 GitHub stars and casdoor has 14,643. openGym has the larger community by that measure.
Are openGym and casdoor free?
Both are open source. openGym is licensed under AGPL-3.0 and casdoor under Apache-2.0. Neither carries a licence fee.
What is the difference between openGym and casdoor?
openGym is written in JavaScript and casdoor in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, openGym or casdoor?
Choose openGym if you want the larger community (15,277 stars) or its AGPL-3.0 licence terms. Choose casdoor if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.