Marktest is leading in Top 10K Sites and Top 100K Sites.
Zeta Search has better usage coverage in more websites categories. Including Business & Industry, Internet & Telecom, Finance, Health and 17 other categories.
Marktest is leading in People & Society, Music & Audio, Arts & Entertainment, News & Media and one other category.
Zeta Search is leading in most countries, including United States, Canada, Colombia, India and 2 other countries.
Marktest is leading in Brazil.