SpotX is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
SpotX has better usage coverage in more websites categories. Including Arts & Entertainment, News & Media, Autos & Vehicles, Car Buying and 83 other categories.
Twiago is leading in Dictionaries & Encyclopedias, Reference, Horses, Relationships & Dating and 4 other categories.
SpotX is leading in most countries, including United States, Netherlands, Spain, United Kingdom and 42 other countries.
Twiago is leading in Germany.