Impresiones Web is leading in Top 1M Sites.
Impresiones Web has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Adult, Music & Audio and 61 other categories.
Open AdExchange is leading in Sports, Office Products, Auctions, Computer Hardware and one other category.
Impresiones Web is leading in most countries, including Spain, Mexico, Argentina, Peru and 49 other countries.
Open AdExchange is leading in Denmark, Norway, Sweden and Portugal.