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 81 other categories.
AdAction is leading in Business & Industry, Arts & Entertainment, Internet & Telecom, Marketing & Advertising and 62 other categories.
AdAction is leading in most countries, including Sweden, Norway, Netherlands, Denmark and 37 other countries.
Shopzilla is leading in United States, India, Brazil, Russia and 9 other countries.