Integral Ad Science is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Integral Ad Science has better usage coverage in more websites categories. Including News & Media, Arts & Entertainment, Business & Industry, Computer & Electronics and 76 other categories.
Shopzilla is leading in Shopping, People & Society, Clothing, Consumer Electronics and 61 other categories.
Integral Ad Science is leading in most countries, including United States, United Kingdom, Canada, France and 68 other countries.
Shopzilla is leading in Venezuela, Macedonia, Armenia and Maldives.