Impresiones Web is leading in Top 1M Sites.
Impresiones Web has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Adult, Business & Industry and 69 other categories.
Open AdExchange is leading in Newspapers, Sports, Office Products, Auctions and 2 other categories.
Impresiones Web is leading in most countries, including Spain, Mexico, Argentina, Peru and 48 other countries.
Open AdExchange is leading in Denmark and Norway.