Usablenet is leading in Top 100K Sites and Top 1M Sites.
YellowTracker has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, People & Society, News & Media and 76 other categories.
Usablenet is leading in Clothing, Consumer Electronics, Mobile Developers, Home & Garden and 4 other categories.
YellowTracker is leading in most countries, including Netherlands, Belgium, Germany, Russia and 12 other countries.
Usablenet is leading in United States, United Kingdom, Spain, Chile and 7 other countries.