This is by no means a huge company but just another sign of the region strength when it comes to innovation that few other areas can replicate easily. When you get so many smart people together, something new/creative is bound to come of it. Now, will all ideas turn to mega profits? Of course not. But all you need to do, is connect once and bingo!
http://www.bizjournals.com/sanfrancisco/blog/2016/05/clover-health-insurance-funding.html