head to head · open source
Uptime Kuma vs kapacitor
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped yesterday. kapacitor has 2,377 stars, 479 forks, 834 open issues and last shipped yesterday. Uptime Kuma leads on adoption by 3,749% (91,498 vs 2,377 stars). Uptime Kuma is written in JavaScript under MIT; kapacitor is written in Go under MIT. Uptime Kuma has attracted 9% as many forks as stars, kapacitor 20%. kapacitor was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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 | kapacitor | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 2.4K |
| License | MIT | MIT |
| Written in | JavaScript | Go |
| Last push | 2026-09-18 | 2026-09-18 |
| Forks | ⑂ 8.4K | ⑂ 479 |
| 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 kapacitor if
- You want the kapacitor feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and kapacitor 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 kapacitor
Kapacitor is an open source, MIT licensed framework written in Go for processing, monitoring, and alerting on time series data, built for operators and platform engineers who store metrics in InfluxDB and need rule based stream and batch processing on top of them.
read the full kapacitor overview →
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Frequently asked questions
Is Uptime Kuma or kapacitor more popular?
Uptime Kuma has 91,498 GitHub stars and kapacitor has 2,377. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and kapacitor free?
Both are open source. Uptime Kuma is licensed under MIT and kapacitor under MIT. Neither carries a licence fee.
What is the difference between Uptime Kuma and kapacitor?
Uptime Kuma is written in JavaScript and kapacitor 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 kapacitor?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose kapacitor if its feature set, stack or MIT licence fits better. Both are self-hostable.