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 72 other categories.
Shopzilla is leading in Shopping, People & Society, Clothing, Consumer Electronics and 63 other categories.
Integral Ad Science is leading in most countries, including United States, United Kingdom, France, Canada and 69 other countries.
Shopzilla is leading in South Africa and Zimbabwe.