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Nagios

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Open source infrastructure monitoring platform with a commercial enterprise edition, Nagios XI

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  • Deployment On Premises
  • Starting price Free
  • Free trial Not offered
  • Best for Freelancers, SMEs, Enterprises

What is Nagios?

Nagios is a long standing infrastructure monitoring platform maintained by Nagios Enterprises, based in Saint Paul, Minnesota. Nagios Core is the free, open source monitoring engine that checks the availability of servers, networks, and services and sends alerts when problems occur. Nagios XI is the commercial enterprise edition built on top of Core, adding a web based configuration interface, dashboards, and wizards.

Nagios XI is sold as a perpetual license rather than a subscription, with tiers based on the number of monitored nodes, plus an Enterprise add on for capacity planning and reporting. A free edition of Nagios XI supports up to 7 nodes or 100 services. Nagios also sells Log Server, Network Analyzer, and Fusion as separate licensed products.

Key Features of Nagios

Nagios lists 10 documented features, including Host, service, and network monitoring engine (Nagios Core), Web based dashboards and Smart Dashboards with graphs, gauges, and heatmaps (XI) and Configuration wizards for common devices including Meraki and Nutanix. The list below covers what the product does rather than how it is marketed.

  • Host, service, and network monitoring engine (Nagios Core)
  • Web based dashboards and Smart Dashboards with graphs, gauges, and heatmaps (XI)
  • Configuration wizards for common devices including Meraki and Nutanix
  • Email and SMS alerting with escalation
  • 50+ official plugins and thousands of community plugins
  • Mod Gearman support for distributed, scalable checks
  • Cross platform agent (NCPA) for Windows, Linux, and macOS
  • Capacity planning and scheduled reporting (Enterprise edition)
  • Host treemap and alert heatmap visualizations
  • SNMP based network device monitoring

Nagios Pricing

Nagios lists 5 plans. Four carry a published figure, from Free to $4,690; the rest are quoted on request.

Nagios Core

Free

Unlimited, self-hosted

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Open source monitoring engine, free forever

Nagios XI Free Edition

Free

7 nodes or 100 services

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Entry level edition of the commercial XI product

Nagios XI Standard (100-node)

$2,595

100 nodes

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Perpetual license, includes dashboards, wizards, and alerting; scales up to $14,995 for 1,000 nodes

Nagios XI Enterprise (100-node)

$4,690

100 nodes

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Adds capacity planning and scheduled reporting; scales up to $17,090 for 1,000 nodes

Nagios XI Sitewide

Custom

Unlimited nodes

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Multiple unlimited-node instances at a discount

Nagios Specifications

Nagios is available on web app. It offers an API and has a free plan.

Deployment
  • On Premises
Billing cycle
One-time
Desktop
  • Web App
Languages
  • English
Built for
  • Freelancers
  • SMEs
  • Enterprises
Support
  • Email
  • Phone
  • Tickets
  • Training
Integrations
Slack, PagerDuty, email, SMS gateways, SNMP devices, Meraki, Nutanix, Mod Gearman, NCPA agents, custom plugins
Public API
Yes
Free trial
No
Free plan
Yes
Runs in browser
Yes
Customisable
Yes
Website
nagios.org

Nagios Videos

Nagios Screenshots

Nagios screenshot 1

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Nagios FAQs

Nagios Core, the open source monitoring engine, is completely free. Nagios XI, the commercial enterprise edition, has a free edition limited to 7 nodes or 100 services, with paid tiers above that.

Nagios XI uses perpetual licensing based on the number of monitored nodes, starting at $2,595 for a 100-node Standard license and $4,690 for a 100-node Enterprise license, with the first year of maintenance included.

Nagios Core is the free open source monitoring engine run from configuration files. Nagios XI adds a web based interface, dashboards, configuration wizards, and reporting on top of Core.

Nagios can monitor cloud hosted servers and services, but it is deployed and managed by the user on their own server rather than offered as a hosted SaaS product.

Mod Gearman is a distributed job processing plugin, now officially supported in Nagios XI, that offloads checks from the main server to remote worker nodes for better scalability.