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 55 other categories.
Usablenet is leading in Shopping, Food & Drink, Food & Grocery Retailers, Home & Garden and 13 other categories.
YellowTracker is leading in most countries, including Netherlands, Belgium, Poland, Russia and 10 other countries.
Usablenet is leading in United States, United Kingdom, Spain, Italy and 7 other countries.