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 50 other categories.
Simple AdServer is leading in Motorsports, Sports and Consumer Electronics.
Harren Media is leading in most countries, including Brazil, United States, Mexico, Indonesia and 31 other countries.
Simple AdServer is leading in Hungary.