In terms of market share, eProof is clearly lagging behind, losing to Marktest in all segments.
Marktest has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Music & Audio, TV & Video and 5 other categories.
eProof is leading in News & Media, Adult, Finance and Accounting.
Marktest is leading in most countries, including Portugal, Brazil, Israel, France and one other country.
eProof is leading in United States.