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 105 other categories.
Shopzilla is leading in Shopping, People & Society, Clothing, Consumer Electronics and 51 other categories.
Ad Butler is leading in most countries, including United States, United Kingdom, Belarus, Canada and 79 other countries.
Shopzilla is leading in Poland.