AdBuyer.com is leading in Top 1M Sites.
AdBuyer.com has better usage coverage in more websites categories. Including Business & Industry, Career & Education, Shopping, People & Society and 64 other categories.
Open AdExchange is leading in News & Media, Real Estate, Sports, Office Products and 6 other categories.
AdBuyer.com is leading in most countries, including United States, Israel, France, Greece and 23 other countries.
Open AdExchange is leading in Denmark, Sweden, Ukraine, Romania and one other country.