Ad Butler is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Ad Butler has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, News & Media, Sports and 102 other categories.
Shopzilla is leading in Shopping, People & Society, Clothing, Consumer Electronics and 52 other categories.
Ad Butler is leading in most countries, including United States, United Kingdom, Canada, Belarus and 77 other countries.
Shopzilla is leading in Japan, Taiwan, Zimbabwe, Nepal and 3 other countries.