Ad Butler is leading in Top 100K Sites and Top 1M Sites.
Ad Butler has better usage coverage in more websites categories. Including Business & Industry, News & Media, Arts & Entertainment, Sports and 111 other categories.
Open AdExchange is leading in Sports, Office Products and Textiles & Nonwovens.
Ad Butler is leading in most countries, including United States, United Kingdom, Canada, Mexico and 76 other countries.
Open AdExchange is leading in Denmark, Latvia and Guatemala.