• AlwaysOn, Thursday, February 28, 2013 8:05 AM

This year's OnMedia100 top companies -- plus 30 to watch -- represent privately owned media, advertising, marketing, social commerce, branding, and public relations firms. They were selected based on innovation, market potential, commercialization, stakeholder value, and media buzz. Each is an alphabet list of the best: the ad network category had 32 winners from 33Across to YuMe; B-to-B tech companies saw 20 winners from AddThis to Turn; community platforms ranged from AdKeeper to Twitter (with Tumblr, Pinterest and the other big ones on display.)

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