Top Open Source Uptime Monitoring Tools in 2026
A curated collection of the 11 best free and open-source Uptime Monitoring tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
Uptime Kuma
Self-hosted website monitoring tool
Stars90,660Last commit11d agoLicenseMITStatusScout
Security and uptime monitoring for developers
Stars15Last commit3mo agoLicenseOpen SourcePeekaping
Self-hosted uptime monitoring for websites and APIs
Stars1,179Last commit3mo agoLicenseMITOpenStatus
Free & open source status page for teams
Stars9,024Last commit10d agoLicenseAGPL-3.0
OneUptime
Open-source observability & incident management
Stars7,523Last commit10d agoLicenseApache-2.0Kener
Free, open-source status page and uptime monitor with Docker deployment. Track 11 service types, manage incidents, schedule maintenance, and notify subscribers instantly.
Stars5,129Last commit17d agoLicenseMIT
Healthchecks
Open-source cron job monitoring service
Stars10,289Last commit16d agoLicenseBSD-3-Clause
Gatus
Automated status pages with advanced uptime monitoring
Stars11,909Last commit20d agoLicenseApache-2.0
EasyMonitor
Self-hosted uptime monitoring with multi-region probes
Stars74Last commit15d agoLicenseMITCheckmate
Open-source infrastructure monitoring tool
Stars10,756Last commit11d agoLicenseAGPL-3.0
Cachet
Open source status page system
Stars15,231Last commit13d agoLicenseOpen Source
