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 Travel, Real Estate, Newspapers, Law & Government and 11 other categories.
Harren Media is leading in most countries, including Brazil, Spain, United States, India and 28 other countries.
Open AdExchange is leading in Denmark, Sweden, Italy and Guatemala.