Checkly

Checkly is a European synthetic monitoring platform founded in 2018, headquartered in Berlin with roots in the Netherlands. The company was created by developers for developers, focusing on monitoring APIs and web applications using a code-first approach that integrates naturally into modern CI/CD pipelines. Checkly's monitoring-as-code philosophy allows engineering teams to define, version, and deploy their monitoring checks alongside their application code, bridging the gap between testing and production monitoring.

The platform specializes in synthetic monitoring with two primary check types: API checks for testing endpoints with full request/response validation, and browser checks powered by Playwright for testing complete user flows in real browsers. Checkly provides multi-location monitoring from data centers around the world, detailed dashboards and analytics, flexible alerting through Slack, PagerDuty, email, and webhooks, and a powerful CLI for local development and CI/CD integration. The platform also supports private locations for monitoring internal services, a Terraform provider for infrastructure-as-code workflows, and partial open source components available on GitHub.

Headquartered in Berlin, Germany, Checkly hosts its EU customer data within European data centers and is fully GDPR compliant. The platform offers a generous free tier and transparent usage-based pricing that scales with monitoring needs. For European development teams seeking a modern, developer-friendly alternative to the monitoring capabilities of Datadog or PagerDuty, Checkly offers a focused, best-in-class synthetic monitoring solution that integrates seamlessly into developer workflows while keeping data within the EU.