OpenX

OpenX is the world's leading independent ad server for web publishers. Building on the strength of our open source heritage, we offer our vast community of publishers comprehensive, customizable and free to use ad serving technology. The OpenX Ad Server empowers our community of more than 150,000 websites across the Internet with the ability to take control of their ads and maximize their ad revenue and relevance. The OpenX Ad Server products are translated into 25 languages, used in more than 100 countries around the world, and serve more than 300 billion ads each month. OpenX Market is the company's unique monetization platform and is designed to help publishers maximize the price of their inventory and to help advertisers much more effectively target where their ads are served. The Market uses a real-time auction marketplace in which multiple classes of buyers bid for each impression provided by OpenX's vast publisher base.
 
OpenX Technologies, Inc., a wholly owned subsidiary of OpenX Limited, is based in Pasadena, California, with offices in London and Poland. OpenX is backed by leading investors including Accel Partners, Index Ventures and O'Reilly AlphaTech Ventures.