AdAction 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, Clothing, Consumer Electronics and 74 other categories.
AdAction is leading in Business & Industry, Arts & Entertainment, Internet & Telecom, News & Media and 57 other categories.
AdAction is leading in most countries, including Sweden, Norway, Netherlands, Denmark and 36 other countries.
Shopzilla is leading in United States, Canada, Australia, Hungary and 11 other countries.