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, Health and 94 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, United Kingdom, Canada, India and 30 other countries.
Optimatic is leading in Israel, Thailand, Malawi, Kenya and one other country.