In terms of market share, Open AdExchange is clearly lagging behind, losing to Unicast in all segments.
Open AdExchange has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, Shopping, People & Society and 30 other categories.
Unicast hasn't got a lead over Open AdExchange in any websites category.
Open AdExchange is leading in most countries, including Denmark, Sweden, Slovakia and Guatemala.
Unicast is leading in United States.