What they do:
AI-native test infrastructure layer for hardware companies
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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 4 of 7
What they do:
The social trading app for stocks, memes, and perps
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HQ: San Francisco, CA, United States
What they do:
Agentic procurement & inventory for deep tech teams.
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What they do:
Oura Ring for Skin
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HQ: San Francisco, CA, United States
What they do:
The identity and communication layer for AI agents
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HQ: San Francisco, CA, United States
What they do:
Turns real businesses into robotics data vendors
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HQ: San Francisco, CA, United States
What they do:
We find flaws in RL environments and evals and help you fix them.
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HQ: San Francisco, CA, United States
What they do:
Florin is an AI-native insurance company that runs autonomously
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HQ: San Francisco, CA, United States
What they do:
Internal industrial company data for frontier labs
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HQ: San Francisco, CA, United States
What they do:
RL post-training for science reasoning and performance engineering
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HQ: San Francisco, CA, United States
What they do:
Autoresearch as a service: we solve your hardest measurable problems
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HQ: San Francisco, CA, United States
What they do:
Evals for robots
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HQ: San Francisco, CA, United States
What they do:
Model Agnostic AI coworker in Slack
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HQ: San Francisco, CA, United States
What they do:
AI agents that run small businesses
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HQ: New York, NY, United States
What they do:
Building intellectually curious AI
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HQ: San Francisco, CA, United States
What they do:
Instant healthcare for all, starting with work comp
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HQ: New York, NY, United States
What they do:
API sandboxes, built for AI agents
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HQ: San Francisco, CA, United States
What they do:
The secure training data R&D engine for physical AI
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HQ: San Francisco, CA, United States
What they do:
The robot workforce for infrastructure
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HQ: San Francisco, CA, United States
What they do:
Building Autonomous Research Agents for Trading
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HQ: Boston, MA, United States
What they do:
Drones that clear clouds over solar farms and weaken hurricanes
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HQ: San Francisco, CA, United States
What they do:
The AI-native property management company for short-term rentals
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HQ: San Francisco, CA, United States
What they do:
Using VLMs to Catch Damage
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HQ: San Francisco, CA, United States
What they do:
AI that runs factories.
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HQ: San Francisco, CA, United States
What they do:
Financial infrastructure for family caregiving
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HQ: San Francisco, CA, United States
What they do:
The customer brain that connects data to explain customer behavior
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HQ: San Francisco, CA, United States
What they do:
Research lab building the most robotic household in the world
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HQ: San Francisco, CA, United States
What they do:
The Media Engine of the AI Era
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HQ: San Francisco, CA, United States
What they do:
OpenRouter for Agent Tools
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HQ: San Francisco, CA, United States
What they do:
The IDE for Tokenmaxxers
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HQ: Boston, MA, United States
What they do:
AI For The Skilled Workforce
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HQ: San Francisco, CA, United States
What they do:
Effortlessly deploy cloud software factories.
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HQ: San Francisco, CA, United States
What they do:
We make law firms AI-native.
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HQ: San Francisco, CA, United States
What they do:
Your personal context, securely portable across every AI app.
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HQ: San Francisco, CA, United States
What they do:
Crafting simulations for frontier lab model training
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HQ: San Francisco, CA, United States
What they do:
The autonomous AI model factory
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HQ: San Francisco, CA, United States