In terms of market share, Marktest is clearly lagging behind, losing to Vizu in all segments.
Vizu has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Business & Industry, Computer & Electronics and 7 other categories.
Marktest hasn't got a lead over Vizu in any websites category.
Vizu is leading in most countries, including United States, Indonesia, Canada, India and 12 other countries.
Marktest hasn't got a lead over Vizu in any country.