Nagios XI

Learn about Lagios XI's network monitoring software for your business. Includes info on Lagios XI, free trials, pricing, review, and FAQs.

Updated on February 14th, 2023

The SMB Guide is reader-supported. When you buy through links on our site, we may earn an affiliate commission. Learn more


Updated 14th of February 2023

We updated the pricing and key information sections.

Nagios XI is network monitoring software that offers you comprehensive application, service, and network monitoring in one solution. Nagios VI monitors operating systems and systems metrics as well.




Standard Edition

From $1,995.00

Enterprise Edition

From $3,495.00

Nagios Xi

Pros: Stable product with free versions. Instant notifications to prevent issues.

Cons: Some background knowledge of Linux is needed. Initial configuration is challenging at times.

Reputation: Solid solution to assist your business in monitoring mission-critical infrastructure components.

Key Information:

Legal Name

Nagios Enterprises, LLC.


Ethan Galstad

Founding Date

Jan 01, 2007


1295 N. Bandana Blvd., Ste.165, Saint Paul, MN 55108

Number of Employees


Number of Customers




1 (888) 624-4671



Is Nagios XI free?

No, Nagios XI is not free a free service. The company offers two paid plans, as well as a free trial.

How do I update Nagios XI?

Navigate from the Nagios XI web interface to the Admin menu. Click on the "Check for Updates" menu, and then "Check For Updates Now." New updates will be displayed. Click the "Upgrade to Latest Version" button.

What are the main benefits of Nagios XI?

  • Swift detection of network outages.
  • Increased server availability.
  • Fast detection of server outages.
  • Increased availability of processes.
  • Swift detection of protocol failures.
  • Increased availability of services.
  • Increased availability of applications.

Is Nagios XI open source?

Yes. Nagios XI is open source.

Is Nagios Core free?

Yes. You can visit the website to download it.

What can Nagios monitor?

  • Memory usage.
  • Disk usage.
  • Log files.
  • Microprocessor load.
  • Number of currently running processes.

How do I install Nagios on Linux?

Watch this Youtube video to learn how to install Nagios on Linux.

How much does Nagios cost?

Nagios XI's pricing starts at $1,995.00, depending on which plan you choose.

How do I set up Nagios?

Go to the website to learn how to install Nagios.

How does Nagios process external commands given to it?

Nagios does this based on the commands it receives. Commands submitted need to be written to the command file, which is periodically processed by the Nagios daemon.

How does NRPE work in Nagios?

The Nagios Remote Plugin Executor (NRPE) enables you to remotely execute Nagios plugins on other Linux or Unix machines, which allows you to monitor remote machine metrics. It also communicates with some Windows agent add-ons.

Is there a Nagios XI free trial?

Yes. Visit Nagios XI's pricing page to access your 30-day free trial.

What are some Nagios XI alternatives?