All of the above. YC's software lets us evaluate thousands of applications per year and use the data we generate to continually get better at that. We also ru

All of the above. YC's software lets us evaluate thousands of applications per year and use the data we generate to continually get better at that. We also run bookface, a private site just for YC founders. Sometimes overlooked is the importance of the software that we make accessible to everyone: Hacker News, of course, and our soon-to-launch MOOC Startup School.