Best Open Source Monitoring & Observability Tools in 2026
Open source tools for tracking uptime, performance, and system health of applications and infrastructure.
The most popular pick this year is Uptime Kuma with 86,582 GitHub stars, but all 7 options below are worth considering depending on your needs.
7 open source monitoring & observability tools — ranked by GitHub stars. Browse all
Uptime Kuma
Self-hosted uptime monitoring tool with a polished UI, 90+ notification integrations, and built-in public status pages.
UptimeRobot
SigNoz
Open-source observability platform with logs, traces, and metrics — an alternative to Datadog and New Relic.
Datadog
Beszel
Lightweight self-hosted server monitoring hub with historical data, Docker stats, and configurable alerts.
Datadog
Healthchecks
Open-source cron job and background task monitoring service, written in Python & Django
Pingdom
OpenStatus
Open-source uptime monitoring and status page platform with synthetic checks from 28 global regions and multi-channel alerting.
Pingdom
Lunalytics
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.
UptimeRobot
Kuvasz
Open-source uptime and SSL monitoring service with status pages, multiple notification channels, and Prometheus integration.
UptimeRobotHow we rank these tools
Tools are ranked by GitHub stars as a proxy for community adoption and trust. Stars reflect how many developers found a project valuable enough to bookmark — a reasonable signal for quality in the open source world. We only list tools that are actively maintained and open source.
Looking for tools you can run yourself? Browse self-hosted monitoring & observability tools →