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

Invite Media
36 websites

Invite Media is free to use

http://www.invitemedia.com/

Automatically buy from multiple ad exchanges in real-time, all through the same interface. Acquired by Google Double Click

Market Share by Top Websites

1 AdBrite is leading in Top 1M Sites and The Entire Web.

2 Invite Media 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 19 other categories.

2 Invite Media is leading in Business & Consumer Services.

Geography

1 AdBrite is leading in most countries, including United States, India, United Kingdom, Philippines and 69 other countries.

2 Invite Media hasn't got a lead over AdBrite in any country.