Deliver stellar experiences to everyone
Monitor and audit web performance.Start my free trialor Book a demo
Make meaningful improvements where it matters.
The world’s best brands chose Calibre to be their performance companion
Simulate real-world conditions
Understand what your audience is experiencing. Choose from global test locations, turn off ads or mimic mobile devices effortlessly.
Learn about your users
Stay on track with budgets
Know about performance regressions before they affect your sales. Always meet your goals.
Get started with Budgets
Understand the impact of third party code
See the impact of external scripts quickly. Make informed decisions on which tools to use without losing speed.
Analyse the cost of Third Parties
“Calibre offers first-class support for web performance monitoring.”
Addy Osmani, Engineering Manager
Review changes in Pull Requests
Spot performance changes before releasing to production. Bring accountability to the entire development team.
Review performance before releases
Automate your performance system
Create tests and access metrics in a breeze. Export data and integrate with your favourite tools.
Start scripting with Node.js API
Receive regular performance reports
Save hours on distilling performance data. Receive beautiful reports on crucial metrics, weekly or monthly.
Get Insights Report in your email
Be confident of results
Never question your performance data. Calibre runs an AI-powered validation engine to ensure the most reliable performance results on the market.
Start your free 15-day trial
Set up in minutes. Nothing to install.