head to head · open source
Uptime Kuma vs xray-checker
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped yesterday. xray-checker has 904 stars, 88 forks, 20 open issues and last shipped 9 days ago. Uptime Kuma leads on adoption by 10,021% (91,498 vs 904 stars). Uptime Kuma is written in JavaScript under MIT; xray-checker is written in Go under AGPL-3.0. Uptime Kuma has attracted 9% as many forks as stars, xray-checker 10%. 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 (monitoring, uptime), 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 | xray-checker | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 904 |
| License | MIT | AGPL-3.0 |
| Written in | JavaScript | Go |
| Last push | 2026-09-18 | 2026-09-10 |
| Forks | ⑂ 8.4K | ⑂ 88 |
| 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 xray-checker if
- You want the xray-checker feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Go
- You evaluated both and xray-checker 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 xray-checker
Xray Checker is an AGPL 3.0 licensed tool written in Go that tests real connections through Xray Core to monitor proxy server availability across the VLESS, VMess, Trojan and Shadowsocks protocols, then exposes the results as Prometheus metrics and REST API endpoints for operators of self hosted proxy and VPN services.
read the full xray-checker overview →
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Frequently asked questions
Is Uptime Kuma or xray-checker more popular?
Uptime Kuma has 91,498 GitHub stars and xray-checker has 904. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and xray-checker free?
Both are open source. Uptime Kuma is licensed under MIT and xray-checker under AGPL-3.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and xray-checker?
Uptime Kuma is written in JavaScript and xray-checker 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 xray-checker?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose xray-checker if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.