I am part of the first startup school by YC. I think it's just few of us survivors left.
My company aihello.com is doing good although AI in production environment is extremely hard. Took us more than a year to just get "good enough" results.
My company was in the Startup School also. We were accepted into YC when we applied after finishing the Startup School (applied twice before, no interview). Interestingly I know other founders from Startup School that were at the demo day as investors!
What's your startup?
Plexus, high-performance haptic gloves for AR and VR