Marktest is leading in Top 10K Sites and Top 100K Sites.
Vertster has better usage coverage in more websites categories. Including Internet & Telecom, Computer & Electronics, Computer Hardware, Health and 9 other categories.
Marktest is leading in People & Society, Music & Audio, Arts & Entertainment, Soccer and 3 other categories.
Vertster is leading in most countries, including Australia, United States, Slovenia and United Kingdom.
Marktest is leading in Portugal and France.