head to head · open source
Uptime Kuma vs NLog
Uptime Kuma has 91,477 GitHub stars, 8,426 forks, 805 open issues and last shipped yesterday. NLog has 6,546 stars, 1,379 forks, 50 open issues and last shipped 2 days ago. Uptime Kuma leads on adoption by 1,297% (91,477 vs 6,546 stars). Uptime Kuma is written in JavaScript under MIT; NLog is written in C# under BSD-3-Clause. Uptime Kuma has attracted 9% as many forks as stars, NLog 21%. 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 | NLog | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 6.5K |
| License | MIT | BSD-3-Clause |
| Written in | JavaScript | C# |
| Last push | 2026-09-17 | 2026-09-16 |
| Forks | ⑂ 8.4K | ⑂ 1.4K |
| 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 NLog if
- You want the NLog feature set and don't need the biggest community
- You prefer the BSD-3-Clause license terms
- Your stack matches C#
- You evaluated both and NLog 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 NLog
NLog is a free logging platform for .NET, distributed under the BSD 3 Clause license and maintained in the NLog/NLog repository on GitHub. It provides rich log routing and management capabilities, so an application can produce and manage high quality logs regardless of its size or complexity. It lives in the .NET ecosystem, is written in C , and targets cross platform use across .NET Framework, .NET Core, ASP.NET Core, MAUI, and Mono. The project has been developed for fourteen years and is published as the NLog package on NuGet, with the current 6.0 line adding AOT support.
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Frequently asked questions
Is Uptime Kuma or NLog more popular?
Uptime Kuma has 91,477 GitHub stars and NLog has 6,546. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and NLog free?
Both are open source. Uptime Kuma is licensed under MIT and NLog under BSD-3-Clause. Neither carries a licence fee.
What is the difference between Uptime Kuma and NLog?
Uptime Kuma is written in JavaScript and NLog in C#. 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 NLog?
Choose Uptime Kuma if you want the larger community (91,477 stars) or its MIT licence terms. Choose NLog if its feature set, stack or BSD-3-Clause licence fits better. Both are self-hostable.