San Francisco – RadiumOne, an online ad network that
leverages the social Web, has raised $21 million in its second round of funding,
led by Crosslink Capital.

New investor DFJ Esprit, and previous backers Adams
Street Partners and Trinity Ventures also participated in the round.

Founded in
2009, San Francisco-based RadiumOne says its platform "analyzes how users
communicate with their closest connections, [and] identifies the specific
consumers who are most likely to engage with a brand’s ads."

The company
will use the new funding for international expansion and acquisitions.


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