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 89 other categories.
Open AdExchange is leading in News & Media, Newspapers, Visual Arts & Design, Performing Arts and one other category.
Microsoft adCenter Conversion is leading in most countries, including United States, United Kingdom, France, Canada and 25 other countries.
Open AdExchange is leading in Denmark and Sweden.