Best Open-source Infrastructure Monitoring tools

Checkmk

Unified monitoring for servers, containers, and cloud workloads

Icinga 2

Scalable monitoring server with powerful DSL and REST API

Prometheus

Flexible monitoring system with powerful queries and autonomous servers

NetXMS

Comprehensive monitoring for networks, servers, and applications

Checkmate

Self-hosted uptime and infrastructure monitoring with real-time alerts

Sensu Go

Scalable, agent‑based monitoring for cloud‑native, distributed systems

Monitorix

Lightweight Perl‑based tool for comprehensive Linux system monitoring

Shinken

Scalable, Python‑based monitoring framework compatible with Nagios