What is Calibre?

Calibre is a comprehensive web performance monitoring platform. Calibre is your companion in improving user experience, speed, SEO and accessibility of your sites and applications.

Core features include:

• Metric dashboards
• Performance Budgets
• Test Profiles
• Third Party Tracking
• Weekly or Monthly Insights Performance Reports
• Automation via Node.js API and CLI

Discover all features →

Pull Request Reviews in GitHub

Pull Request Reviews help you spot performance regressions before they hit your customers. Calibre will post a detailed performance report on each of your Pull Requests, showcasing scores and changes for selected metrics. It will also show whether your Pages are within specified budgets or not.

To use Pull Request Reviews:

• You must have a Calibre account
• Your code has to be hosted on GitHub
• Your Sites must be using one of the following deployment methods: Vercel, Netlify, Heroku or GitHub deployment statuses.

Learn how to set up Pull Request Reviews →

Need help or have questions?

Reach out to our friendly, technical support team.