New York, Aug. 7 (PTI): Facebook founder Mark Zuckerberg’s sister Randi has reportedly quit the social networking site to start her own company.

After working six years in her brother’s shadow as Facebook’s director of market development, Randi Zuckerberg has resigned from her post to set up her own social media company, the Guardian reported online.

Technology bloggers of Silicon Valley are rubbing their hands at the prospect of some sibling rivalry to follow on from the multiple lawsuits that the 27-year-old Mark has endured over the parentage of his popular website.

Business analysts wonder what Randi hopes to achieve that she hasn’t already done.

Her new outfit has a name, RtoZ Media, but no publicly defined goal, no employees, the report said. However, she is unlikely to be planning anything controversial, the report added. “I’m proud of what I’ve done here... but I know I’ll be able to do just as much, or more, for Facebook once I’m on the outside,” the report quoted her as saying in the resignation submitted to her younger brother last week.