Microsoft adCenter Conversion is leading in Top 100K Sites and Top 1M Sites.
Microsoft adCenter Conversion has better usage coverage in more websites categories. Including Business & Industry, Shopping, Health, Computer & Electronics and 104 other categories.
Open AdExchange is leading in Newspapers, Astronomy, Performing Arts and Auctions.
Microsoft adCenter Conversion is leading in most countries, including United States, United Kingdom, France, Canada and 32 other countries.
Open AdExchange is leading in Denmark, Sweden, Poland, Ireland and one other country.