What they do:
AI that finds and fixes OS-level vulnerabilities across device fleets
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HQ: San Francisco, CA, United States
Early-Stage Startups
This list has 3,573 startups and was last updated on Oct 15, 2026. 1,091 of them are hiring right now. Biggest hubs: San Francisco (1,716), New York (430), and London (125). Largest teams: Kapital Bank, Skill-lync, and Wave. Latest round: Clueso raised $10M (Oct 13, 2026).
3,573 startupsPage 97 of 100
What they do:
Combining open-source AI models for better answers at lower cost
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HQ: San Francisco, CA, United States
What they do:
Monetize your agent's traces.
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HQ: San Francisco, CA, United States
What they do:
building the open agent runtime
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HQ: Ankara, Turkey
What they do:
Open-model inference provider for Europe, private by default.
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What they do:
An agentic phone that does your busywork
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HQ: Germany
What they do:
Helping bond investors find what's rich or cheap, and why
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HQ: San Francisco, CA, United States
What they do:
Force-sensing wristband for training robotic AI
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HQ: San Francisco, CA, United States
What they do:
Actuators for Physical AI
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HQ: San Francisco, CA, United States
What they do:
Catch wrong LLM answers before your customers do
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HQ: San Francisco, CA, United States
What they do:
Android for drones
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HQ: San Francisco, CA, United States
What they do:
Helps build social skills through daily practice
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HQ: San Francisco, CA, United States
What they do:
Caveman cuts what AI agents cost without making them dumber.
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HQ: Amsterdam, Netherlands
What they do:
Physical intelligence for every decision with Geospatial AI.
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HQ: San Francisco, CA, United States
What they do:
Always-on AI security engineer
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HQ: San Francisco, CA, United States
What they do:
Lawdingo provides virtual paralegal services to law firms.
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HQ: New York, NY, United States
YC W13Early stage
What they do:
Analytics stack for omnichannel retailers and brands
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HQ: San Francisco, CA, United States
YC W14Early stage
What they do:
We make Privacy Software for SMBs.
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HQ: San Francisco, CA, United States
What they do:
Helping K-12 teachers and school administrators build awesome…
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HQ: Sacramento, CA, United States
YC W14Early stage
What they do:
Community-driven marketplace for sneakers.
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HQ: Los Angeles, CA, United States
YC W15Early stage
What they do:
Marketplace & Software Revolutionizing Yard Care
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HQ: San Francisco, CA, United States
YC W16Early stage
What they do:
Protonet provides the easiest way for a small business to run its own…
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YC W16Early stage
What they do:
Detect Gunshots | Inform Law Enforcement | Empower First Responders
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HQ: New York, NY, United States
YC W16Early stage
What they do:
ApolloShield is a system that detects unwanted drones and drives them…
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YC S16Early stage
What they do:
Analytics to improve how teams work and collaborate
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HQ: Seattle, WA, United States
YC W18Early stage
What they do:
We help retailers and restaurant chains manage repairs and…
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HQ: San Francisco, CA, United States
YC S18Early stage
What they do:
Making low cost versions of high cost generic drugs.
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HQ: Dallas, TX, United States
YC S18Early stage
What they do:
Investing in innovation
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HQ: San Francisco, CA, United States
What they do:
Taali is creating popcorn 2.0 from popped water lily seeds
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HQ: Mumbai, India
YC W19Early stage
What they do:
AI platform accelerating therapies for rare & inflammatory diseases.
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HQ: San Francisco, CA, United States
YC S19Early stage
What they do:
Next-Generation Surgical Navigation and Robotics
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HQ: Boston, MA, United States
YC S19Early stage
What they do:
Avion builds and operates autonomous eVTOL drones that deliver vital…
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HQ: San Francisco, CA, United States
YC W20Early stage
What they do:
The email API built for product teams
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HQ: United States
What they do:
Proactive Testing and Treatments
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HQ: New York, NY, United States
YC W22Early stage
What they do:
Visual AI shopping
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HQ: New York, NY, United States
YC S21Early stage
What they do:
Online University for Tech Professionals
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HQ: San Francisco, CA, United States