In terms of market share, Open AdExchange is clearly lagging behind, losing to zapunited in all segments.
zapunited has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Computer & Electronics, Adult and 16 other categories.
Open AdExchange is leading in Business & Industry, Shopping, Sports, Newspapers and 11 other categories.
zapunited is leading in most countries, including India, United States, United Kingdom, Russia and 12 other countries.
Open AdExchange is leading in Denmark, Sweden, Slovakia, Guatemala and one other country.