Harren Media is leading in Top 100K Sites.
Harren Media has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, TV & Video, Movies and 39 other categories.
Open AdExchange is leading in Marketing & Advertising, Real Estate, Newspapers, Law & Government and 7 other categories.
Harren Media is leading in most countries, including Brazil, Mexico, India, France and 25 other countries.
Open AdExchange is leading in Denmark and Sweden.