Open AdExchange is leading in Top 1M Sites.
Open AdExchange has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, Shopping, People & Society and 30 other categories.
Testnet is leading in Autos & Vehicles, Beauty & Fitness, Beauty, Food & Drink and 5 other categories.
Open AdExchange is leading in most countries, including Denmark, Sweden, United States, Thailand and one other country.
Testnet is leading in Belgium.