Marktest is leading in Top 10K Sites and Top 100K Sites.
Marktest has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Music & Audio, News & Media and 4 other categories.
Visilabs is leading in Business & Industry, Career & Education, Education, Finance and 2 other categories.
Marktest is leading in most countries, including Portugal, Brazil, Israel, Romania and one other country.
Visilabs is leading in Turkey.