San Bruno, Calif.—Email marketing company Responsys Inc. has gone public, with an initial public offering, raising almost $80 million. That money will be used to further fuel the company's expansion, particularly overseas, according to the company.

Responsys has been actively expanding globally. In November, the company opened an office in Bangalore, India, to provide access to local talent in the region. Last summer, Responsys opened an office in Copenhagen, Denmark, and also acquired a controlling interest in Australian email and cross-channel marketing company Eservices Group, since renamed EservicesResponsys, for expansion in the Asia-Pacific market.