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 75 other categories.
AdAction is leading in Business & Industry, Arts & Entertainment, Internet & Telecom, News & Media and 62 other categories.
AdAction is leading in most countries, including Sweden, Norway, Netherlands, Denmark and 40 other countries.
Shopzilla is leading in United States, Canada, India, Egypt and 6 other countries.