In terms of market share, Six Apart Advertising is clearly lagging behind, losing to Testnet in all segments.
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, Pets, Pets & Animals, Real Estate and 2 other categories.
Six Apart Advertising is leading in most countries, including United States, United Kingdom, India, Switzerland and 9 other countries.
Testnet is leading in Belgium.