Marktest is leading in Top 10K Sites and Top 100K Sites.
Scout Analytics has better usage coverage in more websites categories. Including Business & Industry, Health, Science, Real Estate and 11 other categories.
Marktest is leading in Newspapers and Music & Audio.
Scout Analytics is leading in most countries, including United States, United Kingdom, China, France and 5 other countries.
Marktest is leading in Portugal and Brazil.