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, Sports, Consumer Electronics, Mobile Developers and 12 other categories.
YellowTracker is leading in most countries, including Netherlands, Belgium, France, Russia and 15 other countries.
Usablenet is leading in United States, United Kingdom, Spain, India and 6 other countries.