3 Open Source Alternatives to Nagios

There are 3 open-source alternatives to Nagios in this directory. The most popular is Netdata with 78.4k GitHub stars, followed by Prometheus(63.5k stars). All are open source, free to use, and many can be self-hosted.

Quick comparison

Open-source alternatives to Nagios, ranked by GitHub stars
#ToolStarsLanguageLicense
1Netdata

An advanced monitoring software providing real-time performance and health monitoring for your infrastructure.

78.4kCGNU General Public License v3.0
2Prometheus

The Prometheus monitoring system and time series database for collecting and storing metrics as time series data.

63.5kGoApache License 2.0
3Checkmate

Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations.

4.5kJavaScriptGNU Affero General Public License v3.0

All open-source alternatives to Nagios

Frequently asked questions

What are the best open-source alternatives to Nagios?

The top three are Netdata(78.4k stars), Prometheus(63.5k stars), Checkmate(4.5k stars). All are open source and free to use.

Are these alternatives to Nagios free?

Yes. Every tool listed here is open source and free to use in your own projects. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.

Can I self-host an alternative to Nagios?

Many of the alternatives listed are self-hostable. Each tool's page lists hosting details, system requirements, and licensing terms.

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