Opendoor is now worth more than $2 billion after raising $325 million in its latest funding round. : Opendoor, a start-up that buys and sells homes online, has just pulled in $325 million to expand its team, add more cities and move deeper into residential real estate. The new funding pushed the San Francisco-based company's valuation past $2 billion and includes capital from homebuilder Lennar, whose COO, Jon Jaffe, will be joining the company's board, Opendoor said on Wednesday.