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 85 other categories.
Kelkoo hasn't got a lead over ContentClick in any websites category.
ContentClick is leading in most countries, including United Kingdom, United States, Russia, Australia and 36 other countries.
Kelkoo is leading in Norway, Switzerland, Czech Republic and Finland.