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, Arts & Entertainment, Computer & Electronics, Internet & Telecom and 28 other categories.
Vertster is leading in Computer Hardware, Relationships & Dating, Womens Interests, Science and 4 other categories.
Observer is leading in most countries, including United States, Russia, Australia, Japan and 10 other countries.
Vertster is leading in Finland.