In terms of market share, Marktest is clearly lagging behind, losing to Observer in all segments.
Observer has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, Computer & Electronics, Internet & Telecom and 29 other categories.
Marktest is leading in Music & Audio, TV & Video, Religion & Spirituality and Soccer.
Observer is leading in most countries, including United States, Russia, Japan, Sweden and 8 other countries.
Marktest is leading in Portugal.