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 79 other categories.
Open AdExchange is leading in Marketing & Advertising, Real Estate, Law & Government, Computer Hardware and 4 other categories.
ContentClick is leading in most countries, including United Kingdom, United States, Russia, Australia and 37 other countries.
Open AdExchange is leading in Denmark.