head to head · open source
Uptime Kuma vs SigNoz
Uptime Kuma has 91,477 GitHub stars, 8,426 forks, 805 open issues and last shipped yesterday. SigNoz has 32,116 stars, 2,493 forks, 1,557 open issues and last shipped yesterday. Uptime Kuma leads on adoption by 185% (91,477 vs 32,116 stars). Uptime Kuma is written in JavaScript under MIT; SigNoz is written in TypeScript under a custom or non-standard licence. Uptime Kuma has attracted 9% as many forks as stars, SigNoz 8%. Uptime Kuma 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 | SigNoz | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 32K |
| License | MIT | Custom / other |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 8.4K | ⑂ 2.5K |
| 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 SigNoz if
- You want the SigNoz feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches TypeScript
- You evaluated both and SigNoz 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 SigNoz
SigNoz is an open source, OpenTelemetry native observability platform for cloud native applications. It unifies logs, metrics, traces, alerts, and dashboards into a single tool, replacing fragmented monitoring stacks with a correlated signal pipeline. It lives in the observability ecosystem alongside tools like Prometheus, Jaeger, and Grafana, and is positioned as an open alternative to Datadog.
read the full SigNoz overview →
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Frequently asked questions
Is Uptime Kuma or SigNoz more popular?
Uptime Kuma has 91,477 GitHub stars and SigNoz has 32,116. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and SigNoz free?
Both are open source. Uptime Kuma is licensed under MIT, and SigNoz has no licence declared in this registry. Both are free to self-host.
What is the difference between Uptime Kuma and SigNoz?
Uptime Kuma is written in JavaScript and SigNoz in TypeScript. 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 SigNoz?
Choose Uptime Kuma if you want the larger community (91,477 stars) or its MIT licence terms. Choose SigNoz if its feature set, stack or Custom / other licence fits better. Both are self-hostable.