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, Consumer Electronics and 78 other categories.
Ad Spirit is leading in Business & Industry, Sports, Soccer, Travel and 61 other categories.
Shopzilla is leading in most countries, including United States, United Kingdom, Canada, Australia and 19 other countries.
Ad Spirit is leading in Germany, Austria, Switzerland, Spain and 14 other countries.