Ecommerce site speed monitoring

Track down-to-the-millisecond speed metrics for your users, see how speed affects your conversion rate, and get alerts & reports to stay on top of it

Measure site speed for real users

Not everyone sees the same loading times for your site. People on faster devices and connections will have a better experience than others. Blackbird measures highly accurate speed metrics for your actual visitors, so you get the true picture.

Track the Core Web Vitals

Blackbird automatically tracks the Core Web Vitals for your real users over time, so you can make sure you're delivering not just a fast site, but a great user experience.

Largest Contentful Paint
1,688 ms
First Input Delay
19 ms
Cumulative Layout Shift
0.0156

Prove that fast visits perform better

You've always heard that faster visits convert better, but now you can see it with your own data. Blackbird tracks the difference in conversion rates between your faster and slower visits, and tells you when the data is statistically valid.

Faster than average mobile visits are 39% more likely to convert, with a conversation rate of 3.62% vs 2.43% Data is statistically significant

Faster than average mobile visits are 39% more likely to convert, with a conversation rate of 3.62% vs 2.43% Data is statistically significant

Build a case for site speed

Blackbird tracks revenue data for all of your fast and slow visits, so it can use your actual sales data to predict how much additional revenue could be gained by improving your site load time.

In the last 7 days, we've tracked £495,212 of revenue for Acme Co.
We've projected how much additional revenue could be gained by improving site speed by 100ms.

Each Week
+ £12,300
Each Month
+ £53,300
Each Year
+ £639,600

Stay on top of site speed with weekly email reports

Keep web performance on your radar with weekly reports emailed every Monday morning, showing whether your speed metrics are moving in the right direction.

Web Performance Alerts

A fast, lightweight tracking tag

Blackbird tracks real user speed metrics using a fast, incredibly lightweight JavaScript tag. It's designed for performance, served from an ultra-fast CDN and weighs less than 5kB (10 times smaller than Google Analytics!).

No credit card required