In terms of market share, Open AdExchange is clearly lagging behind, losing to Testnet in all segments.
Open AdExchange has better usage coverage in more websites categories. Including Business & Industry, Shopping, Sports, Tourism and 14 other categories.
Testnet is leading in Food & Drink, Cooking & Recipes, Autos & Vehicles, Automotive Industry and 2 other categories.
Open AdExchange is leading in most countries, including Denmark, Norway, Portugal, Sweden and one other country.
Testnet is leading in Belgium.