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 People & Society, Music & Audio, Arts & Entertainment, Business & Industry and 3 other categories.
eProof is leading in News & Media, Accounting, Finance and Adult.
eProof is leading in most countries, including United States and Egypt.
Marktest is leading in Brazil.