Ad Spirit is leading in Top 100K Sites and Top 1M Sites.
Ad Spirit has better usage coverage in more websites categories. Including Sports, Business & Industry, Arts & Entertainment, Soccer and 82 other categories.
Six Apart Advertising is leading in Humor, Law & Government, Government, Animation & Comics and 7 other categories.
Ad Spirit is leading in most countries, including Germany, Austria, Switzerland, Poland and 21 other countries.
Six Apart Advertising is leading in United States, Taiwan, Denmark, South Korea and 4 other countries.