Microsoft adCenter Conversion is leading in Top 1M Sites.
Microsoft adCenter Conversion has better usage coverage in more websites categories. Including Business & Industry, Shopping, Health, Computer & Electronics and 92 other categories.
Open AdExchange is leading in News & Media, Newspapers, Jobs & Employment, Auctions and 4 other categories.
Microsoft adCenter Conversion is leading in most countries, including United States, United Kingdom, Canada, France and 38 other countries.
Open AdExchange is leading in Denmark, Netherlands and Norway.