In terms of market share, Marktest is clearly lagging behind, losing to YellowTracker in all segments.
YellowTracker has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, People & Society, News & Media and 80 other categories.
Marktest hasn't got a lead over YellowTracker in any websites category.
YellowTracker is leading in most countries, including Netherlands, Belgium, United States, Germany and 16 other countries.
Marktest is leading in Brazil and Portugal.