Usablenet is leading in Top 10K Sites, 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 73 other categories.
Usablenet is leading in Travel, Accommodation & Hotels, Clothing, Death and 19 other categories.
YellowTracker is leading in most countries, including Netherlands, Belgium, Russia, Germany and 12 other countries.
Usablenet is leading in United States, United Kingdom, Spain, Canada and 10 other countries.