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, Business & Industry, Music & Audio and 42 other categories.
Pollcaster is leading in News & Media, Health, Computer & Electronics, Fashion & Modeling and 30 other categories.
Zimbio is leading in most countries, including Great Britain, Canada, Brazil, France and 38 other countries.
Pollcaster is leading in United States, Estonia, Indonesia, Chile and 11 other countries.