head to head · open source
Uptime Kuma vs witr
Uptime Kuma has 91,477 GitHub stars, 8,426 forks, 805 open issues and last shipped yesterday. witr has 22,374 stars, 781 forks, 17 open issues and last shipped 1 months ago. Uptime Kuma leads on adoption by 309% (91,477 vs 22,374 stars). Uptime Kuma is written in JavaScript under MIT; witr is written in Go under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, witr 3%. 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 | witr | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 22K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Go |
| Last push | 2026-09-17 | 2026-08-15 |
| Forks | ⑂ 8.4K | ⑂ 781 |
| 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 witr if
- You want the witr 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 witr 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 witr
witr is an open source, Apache 2.0 licensed Go tool with both a command line interface and an interactive terminal UI that traces any process, port, container, or file back to the exact chain of systems that started it, and it is built for operators, SREs, and developers who need to answer "why is this running?" during debugging and incident response.
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Frequently asked questions
Is Uptime Kuma or witr more popular?
Uptime Kuma has 91,477 GitHub stars and witr has 22,374. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and witr free?
Both are open source. Uptime Kuma is licensed under MIT and witr under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and witr?
Uptime Kuma is written in JavaScript and witr 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 witr?
Choose Uptime Kuma if you want the larger community (91,477 stars) or its MIT licence terms. Choose witr if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.