AdBuyer.com is leading in Top 1M Sites.
AdBuyer.com has better usage coverage in more websites categories. Including Business & Industry, Shopping, Career & Education, Arts & Entertainment and 62 other categories.
Open AdExchange is leading in Real Estate, News & Media, Sports, Gambling and 6 other categories.
AdBuyer.com is leading in most countries, including United States, India, Australia, Canada and 21 other countries.
Open AdExchange is leading in Denmark, Sweden, Slovakia and Guatemala.