AdBuyer.com is leading in Top 100K Sites and Top 1M Sites.
AdBuyer.com has better usage coverage in more websites categories. Including Business & Industry, Career & Education, Shopping, Arts & Entertainment and 64 other categories.
Open AdExchange is leading in News & Media, Real Estate, File Sharing, Computer Hardware and 6 other categories.
AdBuyer.com is leading in most countries, including United States, France, Israel, Canada and 19 other countries.
Open AdExchange is leading in Denmark, Sweden, Malta, Greenland and one other country.