head to head · open source
Uptime Kuma vs oshi
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped today. oshi has 5,266 stars, 916 forks, 5 open issues and last shipped 13 days ago. Uptime Kuma leads on adoption by 1,638% (91,498 vs 5,266 stars). Uptime Kuma is written in JavaScript under MIT; oshi is written in Java under MIT. Uptime Kuma has attracted 9% as many forks as stars, oshi 17%. Uptime Kuma 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
| Uptime Kuma | oshi | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 5.3K |
| License | MIT | MIT |
| Written in | JavaScript | Java |
| Last push | 2026-09-18 | 2026-09-05 |
| Forks | ⑂ 8.4K | ⑂ 916 |
| 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 oshi if
- You want the oshi feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Java
- You evaluated both and oshi 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 oshi
OSHI is a free, MIT licensed Java library that reads native operating system and hardware information — OS version, processes, memory and CPU usage, disks and partitions, devices, and sensors — through a single cross platform API without installing any additional native libraries.
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Frequently asked questions
Is Uptime Kuma or oshi more popular?
Uptime Kuma has 91,498 GitHub stars and oshi has 5,266. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and oshi free?
Both are open source. Uptime Kuma is licensed under MIT and oshi under MIT. Neither carries a licence fee.
What is the difference between Uptime Kuma and oshi?
Uptime Kuma is written in JavaScript and oshi 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, Uptime Kuma or oshi?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose oshi if its feature set, stack or MIT licence fits better. Both are self-hostable.