AdBuyer.com is leading in Top 100K Sites and Top 1M Sites.
AdBuyer.com has better usage coverage in more websites categories. Including Shopping, Business & Industry, Career & Education, Arts & Entertainment and 59 other categories.
Open AdExchange is leading in Real Estate, News & Media, Law & Government, Performing Arts and 7 other categories.
AdBuyer.com is leading in most countries, including United States, Israel, Canada, France and 18 other countries.
Open AdExchange is leading in Denmark and United Kingdom.