SpotX 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, People & Society, Health, Internet & Telecom and 60 other categories.
SpotX is leading in Arts & Entertainment, Autos & Vehicles, News & Media, Car Buying and 54 other categories.
SpotX is leading in most countries, including United States, Germany, Netherlands, Spain and 41 other countries.
Vocus is leading in Canada, China, Poland, Singapore and 7 other countries.