head to head · open source
Uptime Kuma vs NebulaLogger
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped yesterday. NebulaLogger has 961 stars, 241 forks, 92 open issues and last shipped yesterday. Uptime Kuma leads on adoption by 9,421% (91,498 vs 961 stars). Uptime Kuma is written in JavaScript under MIT; NebulaLogger is written in Apex under MIT. Uptime Kuma has attracted 9% as many forks as stars, NebulaLogger 25%. NebulaLogger 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 | NebulaLogger | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 961 |
| License | MIT | MIT |
| Written in | JavaScript | Apex |
| Last push | 2026-09-18 | 2026-09-18 |
| Forks | ⑂ 8.4K | ⑂ 241 |
| 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 NebulaLogger if
- You want the NebulaLogger feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Apex
- You evaluated both and NebulaLogger 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 NebulaLogger
NebulaLogger is an open source, MIT licensed observability and unified logging framework built natively on the Salesforce platform for Salesforce developers, administrators, and architects who need to capture, tag, mask, and review log data without leaving their org.
read the full NebulaLogger overview →
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Frequently asked questions
Is Uptime Kuma or NebulaLogger more popular?
Uptime Kuma has 91,498 GitHub stars and NebulaLogger has 961. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and NebulaLogger free?
Both are open source. Uptime Kuma is licensed under MIT and NebulaLogger under MIT. Neither carries a licence fee.
What is the difference between Uptime Kuma and NebulaLogger?
Uptime Kuma is written in JavaScript and NebulaLogger in Apex. 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 NebulaLogger?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose NebulaLogger if its feature set, stack or MIT licence fits better. Both are self-hostable.