FredHopper is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
FredHopper has better usage coverage in more websites categories. Including Shopping, Business & Industry, Clothing, Home & Garden and 23 other categories.
Observer is leading in Arts & Entertainment, Computer & Electronics, Internet & Telecom, People & Society and 21 other categories.
FredHopper is leading in most countries, including France, United Kingdom, Germany, Netherlands and 25 other countries.
Observer is leading in Russia, United States, Brazil, China and 3 other countries.