GSI Media 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, Computer & Electronics and 62 other categories.
GSI Media is leading in Children, Sports, Home & Garden and Adult.
Six Apart Advertising is leading in most countries, including United States, India, United Kingdom, Russia and 11 other countries.
GSI Media is leading in China and Australia.