head to head · open source
Uptime Kuma vs pyrra
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped yesterday. pyrra has 1,556 stars, 150 forks, 83 open issues and last shipped 28 days ago. Uptime Kuma leads on adoption by 5,780% (91,498 vs 1,556 stars). Uptime Kuma is written in JavaScript under MIT; pyrra is written in Go under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, pyrra 10%. Uptime Kuma was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (docker, monitoring), 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
| Uptime Kuma | pyrra | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 1.6K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Go |
| Last push | 2026-09-18 | 2026-08-22 |
| Forks | ⑂ 8.4K | ⑂ 150 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Uptime Kuma if
- You weight community size — 91K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick pyrra if
- You want the pyrra 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 pyrra fits your workflow better
About Uptime Kuma
Uptime Kuma is a free, MIT licensed, self hosted monitoring tool with a reactive web dashboard, built for operators and teams that want to watch their own HTTP, TCP, and DNS endpoints and keep the resulting data on their own infrastructure.
read the full Uptime Kuma overview →
About pyrra
Pyrra is an open source tool that makes Service Level Objectives on Prometheus manageable and accessible, turning a single YAML definition into Prometheus recording rules, multi burn rate alerts, and SLO dashboards for platform and SRE teams running Kubernetes, Docker, or filesystem based Prometheus setups.
read the full pyrra overview →
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Frequently asked questions
Is Uptime Kuma or pyrra more popular?
Uptime Kuma has 91,498 GitHub stars and pyrra has 1,556. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and pyrra free?
Both are open source. Uptime Kuma is licensed under MIT and pyrra under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and pyrra?
Uptime Kuma is written in JavaScript and pyrra 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, Uptime Kuma or pyrra?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose pyrra if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.