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 77 other categories.
AdAction is leading in Business & Industry, Arts & Entertainment, News & Media, Internet & Telecom and 61 other categories.
AdAction is leading in most countries, including Sweden, Norway, Netherlands, Denmark and 45 other countries.
Shopzilla is leading in United States, India, Canada, Australia and 12 other countries.