Best Open Source Monitoring & Observability Tools in 2026

Self-hosted uptime monitoring tool with a polished UI, 90+ notification integrations, and built-in public status pages.

Open-source observability platform with logs, traces, and metrics — an alternative to Datadog and New Relic.

Lightweight self-hosted server monitoring hub with historical data, Docker stats, and configurable alerts.

Open-source cron job and background task monitoring service, written in Python & Django

Open-source uptime monitoring and status page platform with synthetic checks from 28 global regions and multi-channel alerting.

Lunalytics is an open-source, self-hosted monitoring tool built with Node.js and React that supports HTTP(S), TCP, ping, Docker, and more. It offers customizable dashboards, status pages, incident management, multi-user access control, and integrations with popular notification services, making it a modern, developer-friendly solution for monitoring uptime and system health.