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, Food & Grocery Retailers, Consumer Electronics, Home & Garden and 8 other categories.
YellowTracker is leading in most countries, including Netherlands, Belgium, Russia, Germany and 15 other countries.
Usablenet is leading in United States, United Kingdom, Spain, Italy and 6 other countries.