AdAction is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Centro has better usage coverage in more websites categories. Including Autos & Vehicles, Car Buying, Career & Education, Health and 74 other categories.
AdAction is leading in Business & Industry, Shopping, Arts & Entertainment, Science and 58 other categories.
AdAction is leading in most countries, including Norway, Sweden, Netherlands, Denmark and 35 other countries.
Centro is leading in United States, Canada, India, Croatia and 24 other countries.