Double.net is leading in Top 100K Sites and Top 1M Sites.
Double.net has better usage coverage in more websites categories. Including Business & Industry, Social Sciences, Science, Internet & Telecom and 50 other categories.
Open AdExchange is leading in Newspapers, Real Estate, Sports, Office Products and 3 other categories.
Double.net is leading in most countries, including Sweden, Niue, United States, United Kingdom and 19 other countries.
Open AdExchange is leading in Denmark, Slovakia, Guatemala and Canada.