AdTotal is leading in Top 10K Sites and Top 100K Sites.
Shopzilla has better usage coverage in more websites categories. Including Shopping, Arts & Entertainment, People & Society, Business & Industry and 47 other categories.
AdTotal is leading in Education, Career & Education, Basketball and Online Marketing.
Shopzilla is leading in most countries, including United States, India, Russia, Canada and 24 other countries.
AdTotal is leading in Poland, Tuvalu and France.