Tailsweep is leading in Top 1M Sites.
Tailsweep has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Business & Industry, Science and 66 other categories.
WebTrends Ads is leading in Motorcycles, Industrial Goods & Services, Computer Hardware, Law & Government and one other category.
Tailsweep is leading in most countries, including Sweden, United States, United Kingdom, Germany and 44 other countries.
WebTrends Ads is leading in Tunisia, Peru, Morocco and Costa Rica.