Optimatic is leading in Top 100K Sites and Top 1M Sites.
Tremor Media has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, News & Media, Music & Audio and 23 other categories.
Optimatic is leading in Games, Online, Autos & Vehicles, Fashion & Modeling and 7 other categories.
Optimatic is leading in most countries, including United States, Algeria, Canada, Poland and 12 other countries.
Tremor Media is leading in Japan, Germany, India, Netherlands and 9 other countries.