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, Online Marketing, Health and 17 other categories.
Marktest is leading in People & Society, Arts & Entertainment, Music & Audio, News & Media and one other category.
Zeta Search is leading in most countries, including United States, Canada and India.
Marktest hasn't got a lead over Zeta Search in any country.