Tailsweep is leading in Top 1M Sites.
Tailsweep has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Social Sciences, Science and 58 other categories.
WebTrends Ads is leading in Transportation & Logistics, Computer Hardware, Law & Government, Law and 2 other categories.
Tailsweep is leading in most countries, including Sweden, United States, Germany, Russia and 37 other countries.
WebTrends Ads is leading in Japan, Indonesia, Mexico, Moldova and 3 other countries.