head to head · open source
Authentik vs openGym
Authentik has 26,074 GitHub stars, 2,094 forks, 1,074 open issues and last shipped 2 days ago. openGym has 15,277 stars, 2,008 forks, 109 open issues and last shipped yesterday. Authentik leads on adoption by 71% (26,074 vs 15,277 stars). Authentik is written in Python under a custom or non-standard licence; openGym is written in JavaScript under AGPL-3.0. Authentik has attracted 8% as many forks as stars, openGym 13%. openGym was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| Authentik | openGym | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 15K |
| License | Custom / other | AGPL-3.0 |
| Written in | Python | JavaScript |
| Last push | 2026-10-23 | 2026-10-24 |
| Forks | ⑂ 2.1K | ⑂ 2.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Authentik if
- You weight community size — 26K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick openGym if
- You want the openGym feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches JavaScript
- You evaluated both and openGym fits your workflow better
About Authentik
What is authentik? authentik is an open source Identity Provider (IdP) for modern SSO. It supports SAML, OAuth2/OIDC, LDAP, RADIUS, and more, designed for self hosting from small labs to large production clusters. Our enterprise offering is available for organizations to securely replace existing IdPs such as Okta, Auth0, Entra ID, and Ping Identity for robust, large scale identity management. Installation Docker Compose: recommended for small/test setups. See the documentation. Kubernetes (Helm Chart): recommended for larger setups. See the documentation and the Helm chart repository. AWS CloudFormation: deploy…
read the full Authentik overview →
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 →
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Frequently asked questions
Is Authentik or openGym more popular?
Authentik has 26,074 GitHub stars and openGym has 15,277. Authentik has the larger community by that measure.
Are Authentik and openGym free?
Both are open source. Authentik has no licence declared in this registry, and openGym is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Authentik and openGym?
Authentik is written in Python and openGym in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Authentik or openGym?
Choose Authentik if you want the larger community (26,074 stars) or its Custom / other licence terms. Choose openGym if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.