San Francisco -- DataSift, the San Francisco-based developer of a social data platform, said on Wednesday it has raised $7.2 million in a follow-on to its first round of funding. Previous backers GRP Partners and IA Ventures led the round, which the company will use to accelerate growth. "While we were not actively looking for financing, we were lucky to receive a fantastic offer from our existing investors that will enable us to continue building our business without the distraction of raising a funding round," said CEO Rob Bailey. DataSift, which launched in November, also announced it has moved into new offices in San Francisco's SOMA district. The company's platform aggregates social interactions from over a million public social data sources, such as Twitter, Facebook, YouTube, blogs, forums and online message boards. It also recently integrated with NewsCred, extending its ability to monitor not just social media, but also news articles, to understand how the news spreads through the social web.