AdBuyer.com is leading in Top 1M Sites.
AdBuyer.com has better usage coverage in more websites categories. Including Business & Industry, Shopping, Career & Education, People & Society and 63 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, Japan, Canada, China and 11 other countries.
Open AdExchange is leading in Denmark, United Arab Emirates, Sweden, Romania and one other country.