3 self-hosted Nagios alternatives

Nagios is a long-standing IT infrastructure monitoring system for hosts, services, and networks, available in core and commercial editions. It is a reference point for monitoring tools. These open-source apps let you replace Nagios with software you host and control yourself.

Best self-hosted Nagios alternatives

MediumHard

bare-metaldocker

Zabbix

Monitoring & Status

Enterprise-grade open-source monitoring solution

Replaces Datadog, Nagios

★ 6.2k Hard setup AGPL-3.0

LibreNMS

Monitoring & Status

Auto-discovering network monitoring system

Replaces Nagios

★ 4.8k Medium setup GPL-3.0

Checkmk

Monitoring & Status

Comprehensive IT infrastructure monitoring

Replaces Nagios, Datadog

★ 2.3k Medium setup GPL-2.0

Compare Nagios alternatives

Switching from Nagios

Moving off Nagios means trading a managed subscription for a service you run yourself. The payoff is ownership: no per-seat pricing, no vendor lock-in, and full control of your data. Start with the option above that matches your setup-difficulty comfort level — every app links to a detailed specs page and head-to-head comparisons.