In terms of market share, GSI Media is clearly lagging behind, losing to Six Apart Advertising in all segments.
Six Apart Advertising has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, News & Media, Humor and 52 other categories.
GSI Media is leading in Sports, Children, Games and Home & Garden.
Six Apart Advertising is leading in most countries, including United States, Germany, United Kingdom, Australia and 9 other countries.
GSI Media hasn't got a lead over Six Apart Advertising in any country.