GTmetrix Performance Blog
News, updates and guides on GTmetrix and general web performance
Why is my GTmetrix Performance Score different from PageSpeed Insights, WebPageTest, and web.dev?
We explain why your GTmetrix Performance Score may be different from other Lighthouse-based tools.
The Difference Between GTmetrix, PageSpeed Insights, Pingdom Tools and WebPagetest
If you’ve used any of these tools, you may wonder why the results are sometimes different. The post serves to highlight the key differences in these performance analysis tools.