Icinga is an open-source monitoring platform for hybrid IT infrastructure, forked from Nagios. See features, free vs paid tiers and top alternatives.
Icinga is an open-source infrastructure monitoring platform that began in 2009 as a fork of Nagios, created by community developers, closely associated with the German consultancy NETWAYS, who wanted faster development and better acceptance of community-contributed patches than Nagios's single-maintainer model allowed.
The project underwent a complete rewrite released as Icinga 2 in June 2014, built in C++ with clustering, a new configuration language and an API-first design, and is now maintained by Icinga GmbH, a company headquartered in Nuremberg, Germany that operates closely alongside NETWAYS GmbH.
Icinga monitors on-premises servers, cloud services, containers and Kubernetes environments from a single vendor-neutral platform, with built-in clustering and high availability for distributed monitoring at scale, plus compatibility with existing Nagios plugins to ease migration.
The ecosystem includes Icinga Web for dashboards, Icinga Director for configuration management and IcingaDB for data storage, alongside integrations with Grafana, Elastic, Graphite, InfluxDB, Terraform, Ansible, AWS and Azure for teams building broader observability pipelines.
Icinga's core software is free and open source under a 'Forever Free' edition that includes unlimited hosts and services, clustering and multi-environment monitoring with no artificial feature caps.
Optional paid subscriptions layer on top for organizations with specific enterprise needs: Repository Subscriptions from around 5,000 euros a year for curated Enterprise Linux packages, Module Subscriptions from around 2,000 euros a year for exclusive enterprise modules, and Support Subscriptions from around 15,000 euros a year for professional 8x5 or 24x7 support.
Yes, the core Icinga platform is free and open source with unlimited hosts and services; paid subscriptions are optional add-ons for enterprise Linux packages, modules and support.
Yes, Icinga was forked from Nagios in 2009 by community developers who wanted faster development and better patch acceptance.
Icinga 2 is the current, C++-based monitoring core, a ground-up rewrite released in 2014 with clustering, a new configuration language and an API-first design.
Yes, Icinga monitors on-premises, cloud, container and Kubernetes environments and integrates with tools like Terraform, Ansible, AWS and Azure.
Icinga is maintained by Icinga GmbH, a company headquartered in Nuremberg, Germany, closely affiliated with NETWAYS GmbH.
Repository Subscriptions start around 5,000 euros per year, Module Subscriptions around 2,000 euros per year, and Support Subscriptions around 15,000 euros per year.