Pollcaster is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Zimbio has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Music & Audio, Business & Industry and 40 other categories.
Pollcaster is leading in News & Media, TV & Video, Shopping, Fashion & Modeling and 29 other categories.
Zimbio is leading in most countries, including Russia, Poland, Spain, Brazil and 22 other countries.
Pollcaster is leading in United States, Australia, United Kingdom, Estonia and 13 other countries.