Best Open Source Uptime Monitoring Tools using CSS in 2026

Checkmate

Beautiful open-source monitoring for modern infrastructure

Stars
9,669
Forks
1,083
Last commit
13 hours ago

Monitor servers, websites, Docker containers, and infrastructure with real-time insights, instant alerts, and powerful analytics. Self-hosted solution.

Open Source Alternative to:

UptimeRobot

Gatus

Advanced automated status page for real-time monitoring

Stars
10,722
Forks
713
Last commit
2 days ago

A highly customizable monitoring solution that provides automated status pages, extensive alerting options, and detailed testing capabilities for your services and infrastructure

Open Source Alternative to:

Opsgenie

OpenStatus

Monitor, alert, and manage your services with ease

Stars
8,584
Forks
646
Last commit
15 hours ago

Open-source uptime monitoring platform for seamless service management, real-time alerts, and comprehensive status pages

Open Source Alternative to:

Opsgenie

OneUptime

Comprehensive monitoring and incident management platform

Stars
6,841
Forks
367
Last commit
5 hours ago

All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly

Open Source Alternative to:

Opsgenie

Kener

Modern Node.js status page for seamless incident management

Stars
4,890
Forks
268
Last commit
12 days ago

Kener is an open-source status page tool that simplifies service monitoring and incident communication with a sleek interface and GitHub integration.

Open Source Alternative to:

Opsgenie

Peekaping

Self-hosted uptime monitoring you own and control

Stars
1,092
Forks
56
Last commit
10 days ago

Open-source uptime monitoring solution with real-time alerts, status pages, and comprehensive checks for websites, APIs, databases, and services.

Open Source Alternative to:

Opsgenie

StatusScout

Complete website health monitoring and security scanning

Stars
12
Forks
2
Last commit
4 months ago

Monitor website uptime, detect security vulnerabilities, find broken links, and simulate user flows. Get instant alerts when issues arise. Free tier available.

Open Source Alternative to:

Opsgenie

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Checkmate

Beautiful open-source monitoring for modern infrastructure

Stars
9,669
Forks
1,083
Last commit
13 hours ago

Monitor servers, websites, Docker containers, and infrastructure with real-time insights, instant alerts, and powerful analytics. Self-hosted solution.

Open Source Alternative to:

UptimeRobot

Gatus

Advanced automated status page for real-time monitoring

Stars
10,722
Forks
713
Last commit
2 days ago

A highly customizable monitoring solution that provides automated status pages, extensive alerting options, and detailed testing capabilities for your services and infrastructure

Open Source Alternative to:

Opsgenie

OpenStatus

Monitor, alert, and manage your services with ease

Stars
8,584
Forks
646
Last commit
15 hours ago

Open-source uptime monitoring platform for seamless service management, real-time alerts, and comprehensive status pages

Open Source Alternative to:

Opsgenie

OneUptime

Comprehensive monitoring and incident management platform

Stars
6,841
Forks
367
Last commit
5 hours ago

All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly

Open Source Alternative to:

Opsgenie

Kener

Modern Node.js status page for seamless incident management

Stars
4,890
Forks
268
Last commit
12 days ago

Kener is an open-source status page tool that simplifies service monitoring and incident communication with a sleek interface and GitHub integration.

Open Source Alternative to:

Opsgenie

Peekaping

Self-hosted uptime monitoring you own and control

Stars
1,092
Forks
56
Last commit
10 days ago

Open-source uptime monitoring solution with real-time alerts, status pages, and comprehensive checks for websites, APIs, databases, and services.

Open Source Alternative to:

Opsgenie

StatusScout

Complete website health monitoring and security scanning

Stars
12
Forks
2
Last commit
4 months ago

Monitor website uptime, detect security vulnerabilities, find broken links, and simulate user flows. Get instant alerts when issues arise. Free tier available.

Open Source Alternative to:

Opsgenie

Open Source Uptime Monitoring Tools using CSS

A curated collection of the best open source tools for checking the availability and response time of services. using CSS.