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 78 other categories.
Ad Spirit is leading in Business & Industry, Sports, Soccer, Internet & Telecom and 57 other categories.
Shopzilla is leading in most countries, including United States, United Kingdom, Canada, India and 25 other countries.
Ad Spirit is leading in Germany, Austria, Switzerland, Spain and 14 other countries.