Atlas is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Yahoo Ad Exchange has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Internet & Telecom, Web Hosting and 128 other categories.
Atlas is leading in News & Media, Computer & Electronics, Software, Travel and 85 other categories.
Atlas is leading in most countries, including United States, United Kingdom, Brazil, France and 135 other countries.
Yahoo Ad Exchange is leading in Japan, Taiwan, Malaysia, Hong Kong and 11 other countries.