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 44 other categories.
Open AdExchange is leading in Marketing & Advertising, Travel, Real Estate, Newspapers and 13 other categories.
Harren Media is leading in most countries, including Brazil, United States, Mexico, Indonesia and 31 other countries.
Open AdExchange is leading in Denmark and Sweden.