Demand vs supply: YC RFS Fall 2026
What YC is asking for (Requests for Startups) against how many recent YC companies (2025+) already build in the mapped cluster. Short bars = open windows.
The Future of American Defense
37
AI-Native Compliance Infrastructure
38
Proving You're Human
38
Multiplayer AI
44
AI for the Aging Population
49
Data for the Real World
53
The Primer
59
AI-Powered Consumer Products for 1 Billion People
59
The Best Time to Build in Crypto
65
Compute at Sea
67
A Cloud for Small Software
86
New Operating Systems for the Physical World
108
Self-Maintaining APIs
203
Mapping RFS theme → cluster is editorial; several themes share a cluster, so identical bars can appear. Supply counts only classified YC companies with a 2025+ batch.