Interpolls is leading in Top 10K Sites and Top 100K Sites.
Interpolls has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, News & Media, Adult and 25 other categories.
WebTrends Ads is leading in Business & Industry, Shopping, Computer & Electronics, Law & Government and 16 other categories.
WebTrends Ads is leading in most countries, including Canada, United Kingdom, Indonesia, Guatemala and 17 other countries.
Interpolls is leading in United States, Brazil, Russia, India and 8 other countries.