What they do:
Test your app with AI, catch bugs before users do
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Y Combinator Spring 2026 Startups
This list has 193 startups and was last updated on Oct 15, 2026. 65 of them are hiring right now. Biggest hubs: San Francisco (133), New York (20), and Paris (7). Largest teams: Hub, 9 Mothers, and Ploy. Latest round: Revnu raised €2.6M (Oct 1, 2026).
193 startupsPage 3 of 6
What they do:
The agent-native serverless cloud
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HQ: San Francisco, CA, United States
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Programmable DNA drug destroying all cancers, unlocking 80% of targets
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HQ: Oxford, United Kingdom
What they do:
Adaptive training coach for runners, cyclists, and triathletes
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HQ: San Francisco, CA, United States
Totalis
Hiring
What they do:
derivative layer for prediction markets
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HQ: New York, NY, United States
YC X26Early stage
What they do:
AI Scheduling for Short Haul Trucks
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HQ: London, United Kingdom
What they do:
Agents that run short-term rental operations end-to-end
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HQ: San Francisco, CA, United States
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Real-world sandboxes to test and train AI agents
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HQ: San Francisco, CA, United States
What they do:
Live Evaluation Arenas for Financial Work
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HQ: New York, NY, United States
What they do:
Monitoring and learning layer for long-running agents
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What they do:
The first wearable that reads your emotions to enhance your EQ.
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HQ: San Francisco, CA, United States
Plena Health
Hiring
What they do:
Plena is the AI operating system for specialty medical practices
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HQ: San Francisco, CA, United States
YC X26Early stage
AgentPhone
Hiring
What they do:
Phone Numbers for AI Agents
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HQ: San Francisco, CA, United States
YC X26Early stage
What they do:
Find and engage with desperate buyers across LinkedIn, Email, and X
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HQ: San Francisco, CA, United States
What they do:
Automated LiveOps for Game Studios
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HQ: San Francisco, CA, United States
What they do:
Autonomous Customer Operations
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HQ: San Francisco, CA, United States
What they do:
AI Customer Support for Fortune 500-scale enterprises
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HQ: San Francisco, CA, United States
What they do:
AI agents for data science (enterprise)
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What they do:
Annotations for robotics data
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HQ: San Francisco, CA, United States
What they do:
Let agents talk to your customers
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HQ: San Francisco, CA, United States
What they do:
Construction Cost Intelligence.
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What they do:
Company Brain.
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HQ: San Francisco, CA, United States
What they do:
We're building robot birds for surveillance.
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HQ: Los Angeles, CA, United States
What they do:
Unlock wasted GPU capacity.
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HQ: London, United Kingdom
What they do:
AI-native credentialing and contracting for healthcare
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HQ: New York, NY, United States
What they do:
AI-native recruiting agency
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HQ: London, United Kingdom
What they do:
Machine intelligence for American Welding
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HQ: Los Angeles, CA, United States
What they do:
Team chat to command all your company's coding agents
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HQ: San Francisco, CA, United States
What they do:
Vanta for hardware
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HQ: San Francisco, CA, United States
What they do:
Monitor and fix product privacy issues before they block growth
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HQ: London, United Kingdom
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Your Capable Desktop AI Companion
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HQ: Irvine, CA, United States
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Autonomous operations for industrial distributors
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HQ: San Francisco, CA, United States
What they do:
Helping your company find 10x engineers.
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HQ: San Francisco, CA, United States
What they do:
AI-automated factory for PCBAs
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What they do:
AI Back-Office Automation for Commercial Lenders
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HQ: San Francisco, CA, United States
What they do:
Measure freight with security cameras
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