Best Open-source Infrastructure Monitoring tools

NetXMS

Comprehensive monitoring for networks, servers, and applications

Checkmate

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

Prometheus

Flexible monitoring system with powerful queries and autonomous servers

Sensu Go

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

Icinga 2

Scalable monitoring server with powerful DSL and REST API

Checkmk

Unified monitoring for servers, containers, and cloud workloads

Monitorix

Lightweight Perl‑based tool for comprehensive Linux system monitoring

Shinken

Scalable, Python‑based monitoring framework compatible with Nagios