Quigo AdSonar is leading in Top 10K Sites and Top 100K Sites.
Shopzilla has better usage coverage in more websites categories. Including Shopping, Business & Industry, Clothing, Consumer Electronics and 81 other categories.
Quigo AdSonar is leading in People & Society, News & Media, Arts & Entertainment, Religion & Spirituality and 59 other categories.
Quigo AdSonar is leading in most countries, including United States, United Kingdom, Brazil, Germany and 33 other countries.
Shopzilla is leading in Russia, Canada, India, Japan and 10 other countries.