Newzia is leading in 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 60 other categories.
Newzia hasn't got a lead over Six Apart Advertising in any websites category.
Six Apart Advertising is leading in most countries, including United States, United Kingdom, France, India and 16 other countries.
Newzia is leading in Japan.