Optimatic is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Vocus has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, People & Society, News & Media and 92 other categories.
Optimatic is leading in Games, Video Games, Home & Garden, Online and 5 other categories.
Vocus is leading in most countries, including United States, Canada, India, United Kingdom and 27 other countries.
Optimatic is leading in Israel, Poland, Sweden, Panama and one other country.