Alternatives to Naemon
Community-run network and host monitoring suite built on the Nagios 4 core. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Naemon
Community-run network and host monitoring suite built on the Nagios 4 core.
Replacements
Listings that take over the same core job as Naemon.
Nagios Core
Monitor hosts and services with a configurable alerting engine.
Nagios Core is the GPL-2.0 upstream engine that Naemon builds on, running plugin-based checks with notifications and needing manual configuration.
Icinga 2
Monitor infrastructure availability with a configurable checking and alerting system.
Icinga 2 is a GPL-3.0 checking and alerting system that supports distributed monitoring, with optional web-interface components to set up.
Nagios XI
Commercial self-hosted edition of Nagios with a web-based setup wizard.
Nagios XI is a paid proprietary Nagios edition with a web setup wizard and dashboards, licensed per node.
Checkmk
Hybrid open-source and commercial monitoring with agent-based and SNMP auto-discovery.
Checkmk adds agent-based and SNMP auto-discovery to reduce manual setup, with advanced features in paid commercial editions.
Zabbix
Enterprise-scale open-source monitoring for networks and applications.
Zabbix is AGPL-3.0 monitoring that scales to tens of thousands of devices with proxies and a large template library, using its own configuration model.
Centreon
French enterprise network and IT monitoring platform with business activity dashboards.
Centreon is a freemium self-hosted platform with business activity dashboards, splitting its full feature set between free and paid enterprise editions.
OpenNMS
Carrier-grade open-source network monitoring platform with event correlation.
OpenNMS is an open-source platform with event correlation and Grafana integration, built for large networks and possibly overkill for small setups.
LibreNMS
Discover and monitor network equipment from a central server.
LibreNMS is GPL-3.0 monitoring that discovers network equipment and provides alerting and historical graphs, focused on devices rather than Nagios-style checks.
Similar software
Related functionality, not a direct replacement.
Prometheus
Metrics database that scrapes targets and evaluates alerting rules.
Monit
A small daemon that monitors Unix processes, files and hosts and restarts or repairs them automatically.
Cacti
RRDtool-based graphing and monitoring for network devices.
Alerta
A self-hosted system that collects, deduplicates and displays alerts from many monitoring tools.
Net-SNMP
A suite of command-line SNMP tools, an agent and a trap daemon for monitoring network devices.
