Checkly

What is Checkly?

Checkly is an open source monitoring platform designed for developers who need to track the uptime and performance of their APIs, applications, and services. It provides both API monitoring and browser-based synthetic monitoring capabilities, allowing teams to detect issues before they impact users. The platform implements a "Monitoring as Code" approach, enabling developers to define monitoring checks using code rather than through graphical interfaces. This makes monitoring configurations versionable, testable, and easier to integrate into development workflows. Users receive immediate alerts when performance degrades or services go offline, helping teams respond quickly to outages. Checkly serves development teams, DevOps engineers, and organizations that prioritize proactive monitoring and uptime management. The open source model makes it accessible for teams looking to self-host their monitoring infrastructure or contribute to the project's development. Key capabilities include synthetic monitoring for both API endpoints and user flows through browsers, customizable alerting, and monitoring automation through code. The platform is particularly suited for teams already working with code-based infrastructure and deployment practices.