Optimatic 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 48 other categories.
Optimatic is leading in Games, Video Games, TV & Video, Home & Garden and 8 other categories.
Six Apart Advertising is leading in most countries, including Canada, Ukraine, Turkey, United Arab Emirates and 10 other countries.
Optimatic is leading in United States, Israel, Poland, Thailand and 8 other countries.