Double.net is leading in Top 100K Sites and Top 1M Sites.
Double.net has better usage coverage in more websites categories. Including Science, Social Sciences, Business & Industry, Internet & Telecom and 51 other categories.
Simple AdServer is leading in Consumer Electronics.
Double.net is leading in most countries, including Sweden, Spain, Germany, United States and 22 other countries.
Simple AdServer is leading in Hungary and India.