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 69 other categories.
AdAction is leading in Business & Industry, Arts & Entertainment, Marketing & Advertising, Internet & Telecom and 65 other categories.
AdAction is leading in most countries, including Sweden, Norway, Netherlands, Denmark and 38 other countries.
Shopzilla is leading in United States, Canada, India, Brazil and 12 other countries.