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

Spring Engage
76 websites

Spring Engage costs money

http://www.springmetrics.com/

Spring Metrics solutions increase revenue for online merchants through automated, real-time customer interaction at the point of customer conversion. Based on behavioral targeting of site visitors, Smart Offers from Spring Metrics increa...

Market Share by Top Websites

1 AdBrite is leading in Top 100K Sites and The Entire Web.

2 In terms of market share, Spring Engage is clearly lagging behind, losing to AdBrite in all segments.

Websites Categories

1 AdBrite has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Adult, Science & Education and 14 other categories.

2 Spring Engage is leading in Home & Garden, Vehicles, Finance and Travel & Tourism.

Geography

1 AdBrite is leading in most countries, including United States, India, United Kingdom, Philippines and 70 other countries.

2 Spring Engage is leading in South Africa.