Nagios XI review 2026: enterprise monitoring pricing by node count, Standard vs Enterprise editions, features, and how it compares to Nagios Core and Zabbix.
Nagios XI is the commercial, enterprise monitoring product from Nagios Enterprises, the company Ethan Galstad founded in 2007 and headquartered in Saint Paul, Minnesota. It is built on top of the free, open-source Nagios Core engine but is licensed and sold separately as a paid product.
Where Nagios Core is a free, configuration-file-driven monitoring engine, Nagios XI wraps that engine in a polished web-based interface with configuration wizards, dashboards, and premium enterprise features, licensed by the number of monitored nodes rather than by user.
Nagios XI provides a full web GUI with configuration wizards, customizable dashboards, performance graphing, and email/SMS alerting built on the Nagios Core monitoring engine.
The Enterprise Edition adds capacity planning, which forecasts when resources like disk space or memory will reach capacity based on historical performance data, plus automated scheduled reporting delivered via email; premium features require an active Maintenance and Support plan.
Nagios XI is licensed by node count. A Free Edition covers up to 7 nodes with basic features. Standard Edition starts around 2,595 dollars for 100 nodes, scaling to roughly 14,995 dollars for 1,000 nodes. Enterprise Edition costs about 2,095 dollars more per tier than Standard and adds capacity planning and scheduled reporting. A Sitewide Enterprise tier offers unlimited nodes across multiple locations at custom pricing.
Nagios XI offers a Free Edition limited to 7 nodes; paid Standard and Enterprise editions are required for larger deployments, starting around 2,595 dollars for 100 nodes.
Nagios Core is the free, open-source monitoring engine, while Nagios XI is a separate paid commercial product from Nagios Enterprises that adds a full web GUI, dashboards, and enterprise features on top of that engine.
Nagios XI is licensed by the number of monitored nodes, with Standard and Enterprise editions priced per node tier from 100 nodes up to custom pricing above 2,000 nodes.
Enterprise Edition adds capacity planning and automated scheduled reporting on top of the Standard Edition feature set.
Nagios XI is developed by Nagios Enterprises, the company Ethan Galstad founded in 2007, headquartered in Saint Paul, Minnesota.
Premium features like single sign-on, capacity planning, and scheduled reporting require an active Maintenance and Support plan.