Nagios is a veteran IT infrastructure monitoring system for servers, networks, applications, and services with alerting and reporting capabilities.
Pricing
$1,995-3,495 one-time
Reviews
2,000+
Founded
1999
Team Size
51-200 employees
Current Deal
Free Nagios Core
About Nagios
Nagios has been a cornerstone of IT monitoring since 1999. Nagios Core is the open-source engine that monitors hosts, services, and network devices with configurable alerting and escalation procedures.
Nagios XI is the commercial version providing a web interface, configuration wizards, capacity planning, and advanced reporting. It monitors availability and performance across the entire IT infrastructure.
The platform uses an extensive plugin architecture with thousands of community and official plugins for monitoring everything from CPU usage to database queries to cloud services.
While newer tools have emerged, Nagios remains widely deployed in enterprise environments due to its proven reliability, extensive documentation, and administrator familiarity.
Pricing
$1,995-3,495 one-time
Nagios Core: Free and open source
Nagios XI Standard: $1,995 one-time (100 nodes)
Nagios XI Enterprise: $3,495 one-time (unlimited nodes)
Annual maintenance: ~$700-1,200/year