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, Shopping, Career & Education, Arts & Entertainment and 63 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, Greece, China and 14 other countries.
Open AdExchange is leading in Denmark and Sweden.