Proving Ground's Fall Sprint (Class 3) is a 72-hour proof-of-work event for founders. No pitching, no polish, just building under real constraints while judges watch how you actually work, not how you present.

Two tracks: Discovery, for builders validating an idea from zero, & Startup, for pre-seed teams proving traction. Real investors & operators judge live. Past teams have gone on to raise from 500 Global & Blitzscaling Ventures, & been admitted into UC Berkeley SkyDeck.

September 23-25, SAP, Palo Alto. Applications open now.