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 27 other categories.
Vertster is leading in Computer Hardware, Agriculture & Forestry, Computer Security, Food & Drink and 4 other categories.
Observer is leading in most countries, including Russia, Netherlands, United States, Germany and 6 other countries.
Vertster is leading in Australia and United Kingdom.