In terms of market share, Observer is clearly lagging behind, losing to Vertster in all segments.
Observer has better usage coverage in more websites categories. Including Business & Industry, Computer & Electronics, Arts & Entertainment, Internet & Telecom and 28 other categories.
Vertster is leading in Computer Hardware, Womens Interests, Science, Agriculture & Forestry and 4 other categories.
Observer is leading in most countries, including United States, Russia, United Kingdom, Brazil and 7 other countries.
Vertster is leading in Poland.