Optimatic is leading in Top 10K Sites, 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 29 other categories.
Optimatic is leading in Games, Business & Industry, Internet & Telecom, Online and 23 other categories.
Tremor Media is leading in most countries, including China, Germany, Japan, France and 14 other countries.
Optimatic is leading in Algeria, Israel, Venezuela, Turkey and 13 other countries.