head to head · open source
Uptime Kuma vs m3
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped today. m3 has 4,896 stars, 463 forks, 222 open issues and last shipped today. Uptime Kuma leads on adoption by 1,769% (91,498 vs 4,896 stars). Uptime Kuma is written in JavaScript under MIT; m3 is written in Go under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, m3 9%. m3 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 | m3 | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 4.9K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Go |
| Last push | 2026-09-18 | 2026-09-18 |
| Forks | ⑂ 8.4K | ⑂ 463 |
| 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 m3 if
- You want the m3 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 m3 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 m3
M3 is an Apache 2.0 licensed, Go based monorepo that provides a distributed time series database, query engine, metrics aggregator, and Prometheus sidecar for teams that need to store and query large volumes of metrics on their own infrastructure.
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Frequently asked questions
Is Uptime Kuma or m3 more popular?
Uptime Kuma has 91,498 GitHub stars and m3 has 4,896. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and m3 free?
Both are open source. Uptime Kuma is licensed under MIT and m3 under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and m3?
Uptime Kuma is written in JavaScript and m3 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 m3?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose m3 if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.