BridgeTrack
12 websites

BridgeTrack offers both free and paid options

http://www.bridgetrack.com/

BridgeTrack is a digital marketing suite that gives you the ability to optimize your marketing efforts across the full spectrum of digital channels.

VS

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 ...

Market Share by Top Websites

2 BridgeTrack is leading in Top 100K Sites.

Websites Categories

1 BridgeTrack has better usage coverage in more websites categories. Including Finance, Business & Consumer Services, Food & Drink, Gambling and one other category.

2 Open AdExchange is leading in Arts & Entertainment, Computers Electronics & Technology, Home & Garden and Jobs & Career.

Geography

1 Open AdExchange is leading in most countries, including Denmark, Pakistan and Sweden.

2 BridgeTrack is leading in United States and Canada.