Ad Spirit is leading in Top 100K Sites and Top 1M Sites.
Shopzilla has better usage coverage in more websites categories. Including Shopping, People & Society, Arts & Entertainment, Clothing and 75 other categories.
Ad Spirit is leading in Business & Industry, Sports, Soccer, Travel and 63 other categories.
Ad Spirit is leading in most countries, including Germany, Austria, Switzerland, Ukraine and 19 other countries.
Shopzilla is leading in United States, India, Brazil, Russia and 18 other countries.