httppool is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
httppool has better usage coverage in more websites categories. Including News & Media, Arts & Entertainment, Business & Industry, People & Society and 80 other categories.
interclick is leading in Law, Universities & Colleges, General Merchandise, Antiques & Collectibles and 4 other categories.
httppool is leading in most countries, including Bulgaria, Serbia, Macedonia, Slovenia and 46 other countries.
interclick is leading in United States, Egypt, Armenia, Djibouti and one other country.