What they do:
Monetize your agent's traces.
Quick facts:
HQ: San Francisco, CA, United States
Y Combinator Summer 2026 Startups
This list has 230 startups and was last updated on Oct 15, 2026. 41 of them are hiring right now. Biggest hubs: San Francisco (185), New York (12), and Los Angeles (6). Largest teams: Isengard Industries Inc, Sunflower, and Care GP. Latest round: Mireye raised $1.01M (Sep 30, 2026).
230 startupsPage 7 of 7
What they do:
AI-native back-office for banks and fintechs
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
AI-controlled optical switching for AI clusters
Quick facts:
HQ: Boston, MA, United States
YC S26Early stage
What they do:
Engineering Intelligence and Token Optimization for the AI-Coding Era
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
We help Fortune 500 companies hedge their supply chain risk
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
Teaching AI to Design Chips
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
Autonomous Hardware Testing
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
Host a Poker Club and Make Money
Quick facts:
HQ: Jaco, Costa Rica
YC S26Early stage
What they do:
World Model for Freight
Quick facts:
HQ: New York, NY, United States
YC S26Early stage
What they do:
cards for AI agents
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
Autopilot for Flight Operations
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
AI teammates for your business-critical work.
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
AI-native Accounting Firm that's killing Deloitte
Quick facts:
HQ: San Francisco, CA, United States
YC S26Early stage
What they do:
The crowdsourced benchmark for AI-generated music and music production
Quick facts:
HQ: San Francisco, CA, United States