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 89 other categories.
Kelkoo hasn't got a lead over Ad Spirit in any websites category.
Ad Spirit is leading in most countries, including Germany, Austria, Switzerland, United States and 23 other countries.
Kelkoo is leading in Indonesia, Norway, Denmark and Finland.