If you’ve used free wi-fi in San Francisco, there’s a good chance you’ve used Zenreach and just don’t know it yet.

The company, until now, has flown largely under the radar, because they wanted to amp up their business quietly for competitive reasons. And they’re finally ready to announce themselves and their new $30 million Series B funding. (Their previous $20 million in funding was super hush-hush). They are also welcoming billionaire investor Peter Thiel to their board.