Quigo AdSonar is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Shopzilla has better usage coverage in more websites categories. Including Shopping, Business & Industry, Clothing, Consumer Electronics and 82 other categories.
Quigo AdSonar is leading in People & Society, News & Media, Arts & Entertainment, Religion & Spirituality and 58 other categories.
Quigo AdSonar is leading in most countries, including United States, Canada, Brazil, India and 40 other countries.
Shopzilla is leading in Japan, Thailand, Spain, Armenia and 9 other countries.