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 83 other categories.
Optimatic is leading in Games, Online, Video Games, Home & Garden and 10 other categories.
Vocus is leading in most countries, including United States, United Kingdom, Canada, India and 28 other countries.
Optimatic is leading in Israel, Peru, Colombia, Japan and 13 other countries.