Open AdExchange
8 websites

Open AdExchange is free to use

http://www.openadex.com/

New Danish website is now live: openadexchange.dk ... Targeted ads from Open AdExchange will provide you with additional earnings on top of your existing ...

VS

zapunited
4 websites

zapunited offers both free and paid options

http://www.zapunited.com/

Earn Money with attractive advertising on your website, blog, forum, or app. Generate traffic, buzz and conversions with efficient advertising.

Market Share by Top Websites

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

Websites Categories

1 Open AdExchange has better usage coverage in more websites categories. Including Arts & Entertainment, Computers Electronics & Technology, Finance, Home & Garden and one other category.

2 zapunited hasn't got a lead over Open AdExchange in any websites category.

Geography

1 zapunited is leading in most countries, including Sri Lanka and United States.

2 zapunited is leading in Sri Lanka and United States.