In terms of market share, Marktest is clearly lagging behind, losing to Vertster in all segments.
Vertster has better usage coverage in more websites categories. Including Computer & Electronics, Internet & Telecom, Computer Hardware, Search Engine and 9 other categories.
Marktest is leading in People & Society, Arts & Entertainment, Music & Audio, TV & Video and 4 other categories.
Vertster is leading in most countries, including Ireland, United Kingdom and United States.
Marktest is leading in Brazil and Portugal.