AdTotal is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Six Apart Advertising has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, News & Media, Humor and 51 other categories.
AdTotal is leading in Sports, Soccer, Chats & Forums, Adult and 9 other categories.
Six Apart Advertising is leading in most countries, including United States, Canada, United Kingdom, Ukraine and 12 other countries.
AdTotal is leading in Poland and Germany.