ClickInc is leading in Top 1M Sites.
ClickInc has better usage coverage in more websites categories. Including Health, Business & Industry, Arts & Entertainment, Food & Drink and 64 other categories.
Observer is leading in Web Design, Autos & Vehicles, Car Buying, Marketing & Advertising and 2 other categories.
ClickInc is leading in most countries, including United States, South Africa, United Kingdom, India and 40 other countries.
Observer is leading in Greece and Netherlands.