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 127 other categories.
Atlas is leading in News & Media, Computer & Electronics, Software, Shopping and 83 other categories.
Atlas is leading in most countries, including United States, United Kingdom, France, Brazil and 138 other countries.
Yahoo Ad Exchange is leading in Japan, Taiwan, Malaysia, Philippines and 18 other countries.