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 83 other categories.
Quigo AdSonar is leading in People & Society, News & Media, Arts & Entertainment, Religion & Spirituality and 57 other categories.
Quigo AdSonar is leading in most countries, including United States, United Kingdom, Spain, Russia and 39 other countries.
Shopzilla is leading in Turkey, Venezuela, Norway, Macedonia and 9 other countries.