The best open source alternative to PagerDuty is Cabot. If that doesn't suit you, our users have ranked more than 25 alternatives to PagerDuty and five of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to PagerDuty are OpenDuty, IncidentFox, Simple Site Monitor and Opslane.
Cabot is a free, open-source, self-hosted infrastructure monitoring platform that provides some of the best features of PagerDuty, Server Density, Pingdom and Nagios without their cost and complexity.
AI-powered incident investigation and on-call assistant that analyzes alerts, infrastructure, and observability data to find root causes.
A robust web application for monitoring website uptime, performance, and SSL certificate expiration. Simple Site Monitor provides an easy-to-use dashboard to track the health of your websites in real-time.
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