head to head · open source
Uptime Kuma vs flogger
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped yesterday. flogger has 1,481 stars, 133 forks, 53 open issues and last shipped 7 days ago. Uptime Kuma leads on adoption by 6,078% (91,498 vs 1,481 stars). Uptime Kuma is written in JavaScript under MIT; flogger is written in Java under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, flogger 9%. Uptime Kuma 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 | flogger | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 1.5K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Java |
| Last push | 2026-09-18 | 2026-09-12 |
| Forks | ⑂ 8.4K | ⑂ 133 |
| 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 flogger if
- You want the flogger feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and flogger 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 flogger
Flogger is a fluent logging API for Java, published under the Apache 2.0 licence by Google, that replaces a wide field of competing Java logging APIs with one unified, self documenting interface.
read the full flogger overview →
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Frequently asked questions
Is Uptime Kuma or flogger more popular?
Uptime Kuma has 91,498 GitHub stars and flogger has 1,481. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and flogger free?
Both are open source. Uptime Kuma is licensed under MIT and flogger under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and flogger?
Uptime Kuma is written in JavaScript and flogger in Java. 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 flogger?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose flogger if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.