Page speed monitoring without the hassle

Calibre automates testing, reporting and alerting, so you don’t have to. It’s built for teams who want to be fast.

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No card required ∙ Nothing to install

Used by the most innovative companies

All-in-one web performance monitoring for professional teams

Most speed tools require elaborate setup and maintenance.

Calibre brings you reports just in a few clicks.

Nothing to install

No coding skills or tracking scripts required.

Works with any site

Test public and password-protected sites, no matter the stack.

Modern metrics

Choose from over 40 user experience metrics, including Core Web Vitals.

Scheduled and on-demand

Run Lighthouse tests when you need them. No long waits for results.

Built for global teams

Track speed from 17 locations.
It’s that easy.

Reliable results

Our verification engine checks every test for anomalies. Never doubt what you see.

Everything you need to understand page speed

You shouldn’t need to become a performance expert. Calibre gives you transparent and actionable reports.

Performance Budgets

Meet your speed goals without guesswork

Set performance budgets based on recommended ranges. Calibre notifies you when there are changes that need your attention.

Insights report

Save time compiling reports

Get an email summary of page speed changes. We churn the data, so you can ditch the spreadsheets (unless you love them!).

Third party tracking

Reduce the impact of third party code

Know which external scripts and tools are letting you down. Find faster alternatives.


Divide work to fit your team

Assign people to relevant projects and invite clients. No more information overload or access issues.

Why people love Calibre

Chris Free

Now we can provide our clients with solutions, instead of setting up our own tooling.

Chris Free, Chief Executive Officer

Carolina J Pernaut

Guaranteeing our clients good performance and best practices has never been easier for us.

Carolina J Pernaut, QA Practice Manager

Paul Irish

Calibre delivers the substance behind the statistics. They know the actionability of performance measurement is paramount.

Paul Irish, Staff Software Engineer

Angel Velasco

What sets Calibre apart is how easily it supports more than basic authentication.

Angel Velasco, Full Stack Engineer

Bernardo Baquero Stand

Thanks to Insights weekly, we were able to detect a massive downgrade in performance.

Bernardo Baquero Stand, Senior Frontend Developer

Daniel Moll

We can now really quickly and easily see the impact of each individual third-party source.

Daniel Moll, Senior Consultant Technology & Integration

Page speed monitoring shouldn’t be complicated

When 83% of people admit that speed is critical, and 1 second delay causes a 20% drop in conversions, lack of investment in speed becomes a liability.

Most existing tools out there require elaborate setup, a lot of time and performance expertise to make an impact. The pressure is high, and so is the barrier to entry. We’ve seen teams of all shapes and sizes struggle to get started and continue working on speed.

That’s why we built Calibre—to remove complexity from page speed tracking, so you can focus on what’s most important to your business. We give you an all-in-one monitoring platform with actionable advice that anyone can use.

Over the years, we’ve helped tens of thousands of people understand and improve the speed of their sites and applications. I’d love for you to give Calibre a try, too!

Ben Schwarz

Ben Schwarz, Founder & CEO

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in just a few minutes

Calibre keeps your entire team focused on speed without needless complexity. Start your free, 15-day trial today.

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