Learn how Checkmk and Nagios differ in their key features, development activity, technology stack and community adoption, so you can decide which of these infrastructure monitoring tools is best for you.

Both Checkmk and Nagios have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, activity, technology, maturity, licensing and features when making your decision.
Both tools have similar popularity levels, with Checkmk having 2,325 stars and Nagios having 2,033 stars on GitHub. In terms of developer contributions, Checkmk has 550 forks, indicating moderate developer engagement.
Checkmk shows more recent development activity with its last commit 4 hours ago, while Nagios was last updated 2 months ago. This suggests Checkmk is being more actively maintained.
Both tools share common technology foundations, being built with JavaScript, CSS, Bash, C, Objective-C, PHP, Perl. However, they differ in their additional technology choices: Checkmk uses Typescript, Python, SCSS, Golang, Rust, Vue, C++, C# while Nagios leverages Ruby.
Nagios has been in development longer, starting 13 years ago, compared to Checkmk which began 7 years ago. This 5.2-year head start suggests Nagios may have more mature features and established processes.
Both projects use the GPL-2.0 license, providing identical terms for usage and distribution.
Both tools serve similar use cases in Infrastructure Monitoring.

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