Network / NMS
Icinga
Icinga GmbH
The modern, refactored Nagios fork — plugin-compatible but with a real config DSL, REST API, better UI, and modular director/reporting add-ons.
- Category
- Network / NMS
- License
- Open core
- Deployment
- Self-hosted
- Cost
- Free
- Free tier
- Yes
- Self-host effort
- Heavy
- Maturity
- Established
- Popularity
- Common Nagios migration target
The catch
More modern than Nagios but still a config-heavy distributed system to design and run; capable monitoring means assembling several Icinga modules and learning its zone/agent architecture.
Monitors
NetworkServersMetrics
Protocols
SNMPICMP / ping
Capabilities
AlertingDashboardsAutodiscoveryAPIConfig as code
Built for
Mid-marketSRE / DevOps
The honest take
Where Nagios shops go when the flat files finally break them. The config DSL and API are a real upgrade; it’s still a build-it-yourself distributed system, not a turnkey product.