Best Web Free Open-Source Monitoring Software

Self-hosted open-source monitoring and alerting for DevOps teams

Open-source APM for cloud‑native microservices

Fast, structured, leveled logging for Go applications

Self-hosted uptime and status page

Real-time global monitoring and alerting system

A system for building agents that monitor and act on your behalf

AI engineering platform for LLM evaluations and observability

Monitoring system and time series database

Open-source observability platform for teams and AI agents

Handle Prometheus alerts with ease

Real-time system monitoring and performance troubleshooting

Cross‑platform real‑time system monitoring for admins and DevOps

Advanced Node.js process manager for production environments

Self‑hosted dashboard for managing AI coding agents

Fast, header-only C++ logging library for high-performance applications

Elegant, structured logging for Go applications

Fast, real‑time web log analyzer for system administrators

Composable observability platform

Real-time server monitoring and incident tracking

Scalable, cost‑effective log aggregation for modern DevOps

Distributed Tracing Platform