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 112 other categories.
Six Apart Advertising is leading in Humor, Nutrition, Fashion & Modeling, Celebrities & Entertainment News and 3 other categories.
Ad Butler is leading in most countries, including United States, United Kingdom, Canada, India and 78 other countries.
Six Apart Advertising is leading in Swaziland.