This seems like the economies of scale would be too hard to make it feasible. Google/Apple have tens of thousands of employees commuting to the exact same place

This seems like the economies of scale would be too hard to make it feasible. Google/Apple have tens of thousands of employees commuting to the exact same place. Startups are spread out all over Palo Alto, Mountain View, etc. I'm skeptical that an economically feasible shuttle service could get me from the Mission to Cal Ave faster than bike + CalTrain.