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 75 other categories.
Quigo AdSonar is leading in People & Society, News & Media, Arts & Entertainment, Religion & Spirituality and 56 other categories.
Quigo AdSonar is leading in most countries, including United States, United Kingdom, Germany, Canada and 26 other countries.
Shopzilla is leading in India, Malaysia, Singapore, New Zealand and 12 other countries.