Nagios Open Source

Nagios Core

Download the core monitoring engine and a basic web interface.


Nagios Core Plugins

Download the latest Nagios Core plugins package (50 plugins).


Nagios Core Frontends

See a variety of Open Source front-ends by the community.


Nagios Core Addons

See additional projects that extend Nagios Core functionality.


Monitoring of all mission-critical infrastructure components on any operating system.

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Make sense of your data. See security threats, audit any system, identify trends and more.

Free Download

Want to find bandwidth bottlenecks? We can tell you who, what, when and where.

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See how we help thousands of companies save money and eliminate downtime



Nagios helps e-commerce retail giant reach $125,000,000 in additional sales

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Single-point monitoring and high availability for 2,500+ servers and 5,000+ network devices

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The University of St. Thomas

University uses better data to improve purchasing decisions, bandwidth allocation, and reaction to anomalies

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Energy solutions giant sees increased capabilities, productivity by deploying Nagios

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Ready to Try Nagios?

You can try any of our solutions free for 60 days with no restrictions. Monitor your entire IT infrastructure, quickly sort log data, or analyze your bandwidth with Nagios. Nagios is helping organizations around the world make better business decisions with proven IT infrastructure monitoring, data collection, and netflow analysis solutions.

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