Marktest is leading in Top 10K Sites and Top 100K Sites.
Uptrends has better usage coverage in more websites categories. Including Arts & Entertainment, Internet & Telecom, People & Society, Accommodation & Hotels and 26 other categories.
Marktest is leading in Newspapers and TV & Video.
Uptrends is leading in most countries, including Netherlands, United States, Germany, Russia and 12 other countries.
Marktest is leading in Portugal.