Six Apart Advertising 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 59 other categories.
Testnet is leading in Autos & Vehicles, Soccer, Pets, Pets & Animals and 2 other categories.
Six Apart Advertising is leading in most countries, including United States, Germany, India, Japan and 15 other countries.
Testnet is leading in Belgium.