Market Share by Top Websites

1 GroupM Server is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Open AdExchange is clearly lagging behind, losing to GroupM Server in all segments.

Websites Categories

1 GroupM Server has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Business & Industry, Internet & Telecom and 60 other categories.

2 Open AdExchange is leading in Newspapers, Auctions, Sports, Gambling and 7 other categories.

Geography

1 GroupM Server is leading in most countries, including Germany, Poland, United Kingdom, Spain and 48 other countries.

2 Open AdExchange is leading in Denmark and Guatemala.