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 103 other categories.
Shopzilla is leading in Shopping, Consumer Electronics, Software, Games and 17 other categories.
Ad Butler is leading in most countries, including United States, United Kingdom, Canada, Mexico and 75 other countries.
Shopzilla is leading in Ecuador.