VOIP phone service startup Ooma has raised $18.3 million in a fourth round of funding, the company tells us. The round was led by Worldview Partners. Founders Fund, TD Fund, and WI Harper also participated. TechCrunch cited sources in late June as saying that Ooma had raised $14 million in the round, although the company did not comment publicly about it at the time.

With the new funding, Ooma will have now raised $61.3 million since its start in 2004. The spokeswoman says that the company’s device—which provides free U.S. phone calls—is now available at more than 5,000 retailers, including Best Buy, Costco, Fry’s, and Microcenter. It sells for $249.99—and Ooma also offers advanced features for an additional $99.99 a year.