RadiumOne is a marketing company that provides online display, mobile, video, and social advertising services through programmatic marketing campaigns. It was first launched in 2009 by Gurbaksh Chahal. The company buys advertising space from websites and mobile applications and resells it in targeted packages to advertisers and agencies. It also creates software that automates the process of media buying for digital marketers. Headquartered in San Francisco, the firm has offices across North America, Europe and Asia.