Checkmate is an open-source, self-hosted uptime and infrastructure monitoring tool that tracks server hardware, uptime, response times, and incidents in real-time with visualizations.
The tool solves the problem of monitoring server availability and performance by regularly checking whether servers and websites are accessible and performing optimally. It provides real-time alerts and generates reports on monitored services' availability, downtime, and response times. Checkmate includes an optional agent called Capture that retrieves additional hardware metrics from remote servers, including CPU, RAM, disk, and temperature status. Capture runs on Linux, Windows, Mac, Raspberry Pi, or any device capable of running Go, though it is not required for basic Checkmate operation.
Checkmate suits teams and organizations that need self-hosted monitoring without relying on external services. It works well for those managing multiple servers or websites who want centralized visibility into infrastructure health and performance. Self-hosting appeals to users with data residency requirements or those preferring to avoid third-party dependencies for critical monitoring infrastructure.
The project maintains active engagement with contributors through good-first-issue and good-first-project labels, indicating deliberate effort to onboard new participants. The codebase is written in TypeScript and uses Material-UI for the frontend, establishing a consistent technology stack. The project provides documentation in multiple languages, reflecting an international development orientation.
