Performance reviews directly in Pull Requests

See the performance impact of your work without leaving GitHub.

Try for freeor View documentation
Bring transparency to your team

Integrate with your developer platform

Calibre tests each Pull Request and compares it to current production metrics. Get a performance summary that’s visible to your entire development team.

Know how releases affect metrics

Tag deployments

Calibre automatically tags deployments on metric charts. Always know which release caused improvements or regressions.

Test changes against performance budgets

Ensure high quality

Performance summaries highlight regressions and guarantee changes exceeding set budgets won’t ship to production. Don’t compromise what your users experience.

Use your favourite deployment tool

Works wherever you do

Pull Request Reviews are available on GitHub and integrate with the most popular deployment platforms: Heroku, Netlify and Vercel (previously ZEIT).

Calibre is a developer-friendly performance companion that works wherever you are