Ad Butler is leading in Top 100K Sites and Top 1M Sites.
AdSpeed has better usage coverage in more websites categories. Including Business & Industry, Finance, People & Society, Arts & Entertainment and 102 other categories.
Ad Butler is leading in News & Media, Sports, Career & Education, Music & Audio and 64 other categories.
Ad Butler is leading in most countries, including United States, United Kingdom, Belarus, Canada and 65 other countries.
AdSpeed is leading in Germany, Australia, Brazil, Greece and 20 other countries.