Nagios Core
Industry-standard open-source monitoring engine
Nagios Core is a mature, highly customisable open-source monitoring platform trusted by thousands of organisations globally. It monitors hosts, services and network infrastructure with extensible plug-in architecture, offering maximum control and minimal licensing constraints.
| Pricing from | Free (open-source) |
| Best for | Enterprise IT teams with technical expertise seeking low-cost, customisable monitoring |
| Website | www.nagios.org |
Strengths and trade-offs
- Completely free and open-source with no licensing fees
- Highly extensible through thousands of community plug-ins and custom scripts
- Steeper initial setup and configuration compared to SaaS solutions
- Requires significant technical expertise and maintenance effort
Appears in
Alternatives to Nagios Core
 DatadogCloud scale monitoring and security | #1 in Top 10 Network Monitoring Tools | 95.0 |
 ZabbixOpen-source monitoring solution for infrastructure and applications | #3 in Top 10 Network Monitoring Tools | 90.3 |
 PrometheusOpen-source monitoring and alerting toolkit for containerised environments | #4 in Top 10 Network Monitoring Tools | 88.0 |
 New RelicAll-in-one observability platform | #5 in Top 10 Network Monitoring Tools | 85.7 |
 GrafanaVisualise and monitor anything | #6 in Top 10 Network Monitoring Tools | 83.3 |
 PRTG Network MonitorUser-friendly agentless network and infrastructure monitoring | #7 in Top 10 Network Monitoring Tools | 81.0 |
Questions about Nagios Core
How much does Nagios Core cost?
Lister lists Nagios Core's pricing as: Free (open-source).
Is Nagios Core free?
Yes. Its pricing reads: Free (open-source).
Who is Nagios Core best for?
Nagios Core is best for enterprise IT teams with technical expertise seeking low-cost, customisable monitoring.
Where does Nagios Core rank?
Nagios Core is ranked #2 in Top 10 Network Monitoring Tools (Lister Score 92.7).
What are the best alternatives to Nagios Core?
The closest alternatives on Lister are Datadog (#1 in Top 10 Network Monitoring Tools), Zabbix (#3 in Top 10 Network Monitoring Tools) and Prometheus (#4 in Top 10 Network Monitoring Tools).
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