Ad Spirit is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Shopzilla has better usage coverage in more websites categories. Including Shopping, People & Society, Arts & Entertainment, Clothing and 74 other categories.
Ad Spirit is leading in Business & Industry, Sports, Soccer, Travel and 64 other categories.
Ad Spirit is leading in most countries, including Germany, Austria, Switzerland, Spain and 21 other countries.
Shopzilla is leading in United States, Russia, Brazil, United Kingdom and 20 other countries.