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 75 other categories.
Open AdExchange is leading in Law & Government, Performing Arts, Jobs & Employment, Computer Hardware and 5 other categories.
ContentClick is leading in most countries, including United Kingdom, United States, India, Russia and 42 other countries.
Open AdExchange is leading in Denmark, Norway, Sweden and Guatemala.