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 78 other categories.
AdAction is leading in Business & Industry, Arts & Entertainment, News & Media, Internet & Telecom and 58 other categories.
AdAction is leading in most countries, including Sweden, Norway, Netherlands, Denmark and 41 other countries.
Shopzilla is leading in United States, United Kingdom, India, Canada and 13 other countries.