• IT Monitoring, Management, and More.

    With Nagios, you’ll never be left having to explain why an unseen infrastructure outage hurt your organization’s bottom line. The Nagios Software Suite delivers outstanding value to thousands of organizations worldwide.

    What is Nagios?

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  • Resolve Issues Fast

    Alerts are sent to IT staff, business stakeholders, and end users via email or mobile text messages, providing them with outage details so they can start resolving issues immediately.

    Download and Try Nagios XI for Free

Introducing Nagios XI 5

The most powerful and trusted IT infrastructure monitoring solution on the market just got better.

  • Install and deploy in under an hour using built-in configuration wizards, alerts, and active reports.
  • Monitor and fix capacity and performance issuesacross all applications, storage, websites, and any virtualization platform with one powerful dashboard.
  • Got MSSQL or Mysql servers? Oracle? Discover and fix performance issues fast.

Learn More and Try


The Industry Standard In IT Infrastructure Monitoring


We provide customers a variety of support options including professional phone, email, and forum support. Become a customer and gain access to the customer-only forum and a 1-business day guaranteed response time.


Our live training course provides students with hands-on training that empowers them with the knowledge to successfully install, configure and manage a Nagios deployment. This virtual, online training allows students to interact with and ask questions of the instructor as they demonstrate various Nagios labs.

Nagios is trusted by these companies and thousands more: