Case Study: CommonLit achieves 100% accurate monitoring with Checkly

How CommonLit Runs Monitoring With 100% Accuracy and No False Positives

CommonLit, a literacy platform serving hundreds of thousands of teachers and students, needed a better way to catch errors because it had no dedicated QA team and relied on manual processes and legacy Cypress-based testing. Before working with **Checkly**, the team experienced delayed error detection, high maintenance overhead, and limited support for accessible testing as they shipped updates multiple times per day.

CommonLit implemented **Checkly** as its code-first synthetic monitoring solution, embedding checks into the CI pipeline and monitoring critical user flows and public pages in production. The result was faster detection and resolution of issues, stronger deployment confidence, and lower monitoring effort and cost — with **0 false positives**, **100% monitor success over the last seven days**, and **11 engineers** using Checkly across **5+ deployments per day**.

CommonLit

Geoff Harcourt

Chief Technology Officer