Top Open Source Infrastructure Monitoring Tools in 2026
A curated collection of the 19 best free and open-source Infrastructure Monitoring tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
NetData
Real-time infrastructure monitoring with AI troubleshooting
Stars80,318Last commit10d agoLicenseGPL-3.0
Nagios
Free open source network & server monitoring tool
Stars2,040Last commit1mo agoLicenseGPL-2.0Wachd
Self-hosted OpsGenie replacement with AI root cause analysis
Stars35Last commit13d agoLicenseOpen Source
VictoriaMetrics
Fast, scalable observability database for metrics, logs and traces
Stars17,599Last commit11d agoLicenseApache-2.0
Uptime Kuma
Self-hosted website monitoring tool
Stars90,660Last commit11d agoLicenseMIT
Uptrace
OpenTelemetry-native observability platform
Stars4,270Last commit2mo agoLicenseAGPL-3.0StatusScout
Security and uptime monitoring for developers
Stars15Last commit3mo agoLicenseOpen Source
SigNoz
Open-source Datadog alternative for full-stack observability
Stars31,936Last commit10d agoLicenseOpen Source
Scanopy
Self-updating network diagrams for infrastructure
Stars5,575Last commit11d agoLicenseAGPL-3.0
ProjectDiscovery
AI-powered security testing for continuously shipped software
Stars30,869Last commit12d agoLicenseMIT
Prometheus
Open-source monitoring & time series database
Stars65,850Last commit10d agoLicenseApache-2.0Peekaping
Self-hosted uptime monitoring for websites and APIs
Stars1,179Last commit3mo agoLicenseMIT
Icinga
Open-source infrastructure monitoring solution
Stars2,233Last commit18d agoLicenseGPL-3.0Grafana
Grafana unifies metrics, logs, traces, profiles, and business data into one OpenTelemetry-native platform with AI-assisted root cause analysis and adaptive cost controls.
Stars76,446Last commit10d agoLicenseAGPL-3.0Gigapipe
Unified platform for logs, metrics, traces and profiles with native compatibility for popular tools like OpenTelemetry, Prometheus, and Loki. No data silos, no usage limits.
Stars1,701Last commit10d agoLicenseAGPL-3.0
