Alternatives to Icinga 2
Monitor infrastructure availability with a configurable checking and alerting system. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Icinga 2
Monitor infrastructure availability with a configurable checking and alerting system.
Replacements
Listings that take over the same core job as Icinga 2.
Nagios Core
Monitor hosts and services with a configurable alerting engine.
Nagios Core offers plugin-based host and service checks with notifications under GPL-2.0, but configuration and many checks need manual setup.
Zabbix
Enterprise-scale open-source monitoring for networks and applications.
Zabbix scales to tens of thousands of devices with proxies and a large template library, though configuration is extensive and the interface is dense.
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, but advanced features and scaling are in paid commercial editions.
Centreon
French enterprise network and IT monitoring platform with business activity dashboards.
Centreon adds business activity dashboards linking infrastructure health to impact, but its full feature set is split between free and paid enterprise editions.
Nagios XI
Commercial self-hosted edition of Nagios with a web-based setup wizard.
Nagios XI adds a web-based setup wizard and dashboards, but it is paid, proprietary software with per-node licensing.
NetXMS
Monitor network devices, servers and infrastructure through a central platform.
NetXMS monitors network devices and servers through a central platform with management interfaces, with enterprise services and editions under separate terms.
LibreNMS
Discover and monitor network equipment from a central server.
LibreNMS focuses on discovering and monitoring network equipment with alerting and historical graphs, depending on supported protocols and credentials rather than service checks.
OpenNMS
Carrier-grade open-source network monitoring platform with event correlation.
OpenNMS brings carrier-grade event correlation and Grafana integration, but its complexity may be overkill for small setups and paid tiers cover enterprise support.
Also worth comparing
These listings name Icinga 2 as their own alternative, so the relationship runs both ways.
Monit
A small daemon that monitors Unix processes, files and hosts and restarts or repairs them automatically.
Icinga 2 supports distributed checks and notifications across many hosts, with more configuration and optional web interface components than Monit's single control file.
Naemon
Community-run network and host monitoring suite built on the Nagios 4 core.
Icinga 2 is a GPL-3.0 checking and alerting system that supports distributed monitoring, with optional web-interface components to set up.
Pandora FMS
A monitoring platform for servers, networks, applications and logs, with an open-source edition.
Icinga 2 is GPL-3.0 check-based monitoring with distributed setups and notifications, without built-in log monitoring or a commercial edition.
Similar software
Related functionality, not a direct replacement.
Prometheus
Metrics database that scrapes targets and evaluates alerting rules.
Prometheus Alertmanager
A server that deduplicates, groups and routes alerts from Prometheus to email, PagerDuty and other receivers.
Grafana
Dashboard and visualization front end for metrics, logs and traces.
Netdata
Per-second metrics for a machine with no configuration, and charts that appear the moment you install it.
Uptime Kuma
A self-hosted uptime monitor that pings your sites and services and tells you the moment one stops answering.
