ContentClick is leading in Top 100K Sites and Top 1M Sites.
ContentClick has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Sports, News & Media and 78 other categories.
Open AdExchange is leading in Marketing & Advertising, Law & Government, Accommodation & Hotels, Office Products and 7 other categories.
ContentClick is leading in most countries, including United Kingdom, United States, Russia, Ireland and 33 other countries.
Open AdExchange is leading in Denmark, Poland and Guatemala.