GSI Media is leading in Top 10K Sites and Top 100K Sites.
Six Apart Advertising has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, News & Media, Computer & Electronics and 60 other categories.
GSI Media is leading in Children, Sports, Home & Garden and Adult.
Six Apart Advertising is leading in most countries, including United States, United Kingdom, France, India and 13 other countries.
GSI Media is leading in Germany.