AdBrite
700 websites

AdBrite is free to use

http://adbrite.com

AdBrite labels itself as the internet's ad marketplace. It provides interstitials and banner ads on a cost per mille (thousand) basis, and text ads on either cost per click or cost per action.

VS

GroupM Server
91 websites

GroupM Server is free to use

http://www.groupm.com/

Ghostery Analysis of GroupM Server. See which sites GroupM Server was found on and learn what GroupM is doing with your data.

Market Share by Top Websites

1 AdBrite is leading in The Entire Web.

2 GroupM Server is leading in Top 10K Sites and Top 100K Sites.

Websites Categories

1 AdBrite has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Adult, Science & Education and 18 other categories.

2 GroupM Server is leading in Vehicles.

Geography

1 AdBrite is leading in most countries, including United States, India, United Kingdom, Philippines and 68 other countries.

2 GroupM Server is leading in Poland, Denmark, Belize and Nigeria.