Ad Spirit is leading in Top 100K Sites and Top 1M Sites.
Ad Spirit has better usage coverage in more websites categories. Including Sports, Business & Industry, Arts & Entertainment, Soccer and 81 other categories.
Mass2 is leading in Car Buying, Banking, Universities & Colleges, Automotive Industry and 2 other categories.
Ad Spirit is leading in most countries, including Germany, Austria, Switzerland, Poland and 25 other countries.
Mass2 is leading in United States and Norway.