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, Business & Industry, Computer & Electronics, Sports and 104 other categories.
zapunited is leading in People & Society, Arts & Entertainment, Adult, Photography and 19 other categories.
Integral Ad Science is leading in most countries, including United States, United Kingdom, France, Canada and 74 other countries.
zapunited is leading in Puerto Rico.