What they do:
Autonomous offensive security agents. The best defense is offense
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HQ: San Francisco, CA, United States
Top AI Startups in California
This list has 1,434 startups and was last updated on Oct 16, 2026. 461 of them are hiring right now. Biggest hubs: San Francisco (1,360), Los Angeles (47), and San Diego (4). Largest teams: Cruise, Relativity Space, and Athelas. Latest round: Agriculture Scout AI raised $425K (Oct 13, 2026).
1,434 startupsPage 21 of 40
What they do:
Autonomous AI defense system for cyber attack
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HQ: San Francisco, CA, United States
What they do:
OpenRouter for Voice AI: one API, every call on the best speech model
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HQ: San Francisco, CA, United States
What they do:
Building Products and Datasets for Frontier Models
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HQ: San Francisco, CA, United States
What they do:
Least cost routing system to reduce 70%+ token spend
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HQ: San Francisco, CA, United States
What they do:
Unifying Global Private Credit
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HQ: San Francisco, CA, United States
What they do:
Turn Your Taste Into Hires
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HQ: San Francisco, CA, United States
What they do:
AI agents that run onboarding, adoption, and renewals
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HQ: San Francisco, CA, United States
What they do:
Robots for high skilled labor powering AI infrastructure
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HQ: San Francisco, CA, United States
What they do:
Real-time cloud inference for robotics.
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HQ: San Francisco, CA, United States
What they do:
Enable robots to operate safely in the real world.
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HQ: San Francisco, CA, United States
What they do:
Growing micro-organs to find new drugs
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HQ: San Francisco, CA, United States
What they do:
A search technology that actually finds what you’re looking for.
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HQ: San Francisco, CA, United States
What they do:
AI-first user research platform
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HQ: San Francisco, CA, United States
What they do:
AI BPO for Specialty Insurance MGAs
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HQ: San Francisco, CA, United States
What they do:
Find the best leads with custom intent signals
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HQ: San Francisco, CA, United States
What they do:
Your AI Partner for SAP Development
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HQ: San Francisco, CA, United States
What they do:
The AI Platform for Medical Education
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HQ: San Francisco, CA, United States
What they do:
The AI platform for CRE investment teams
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HQ: San Francisco, CA, United States
What they do:
The API for LLM tool use
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HQ: San Francisco, CA, United States
What they do:
AI chips for ultra-fast training and inference
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HQ: San Francisco, CA, United States
What they do:
All-in-one platform to create AI agents with your private knowledge
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HQ: San Francisco, CA, United States
What they do:
Build games at the speed of thought
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HQ: San Francisco, CA, United States
What they do:
Infrastructure for managing GPU clusters for training/serving.
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HQ: San Francisco, CA, United States
What they do:
RankAI grows your website on autopilot
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HQ: San Francisco, CA, United States
What they do:
Infuse knowledge into language models with just 10 samples
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HQ: San Francisco, CA, United States
What they do:
AI back office for food product quality teams
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HQ: Los Angeles, CA, United States
What they do:
AI Fitness Coach
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HQ: San Francisco, CA, United States
What they do:
People search powered by AI
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HQ: San Francisco, CA, United States
What they do:
AI Website platform that grows revenue automatically
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HQ: San Francisco, CA, United States
What they do:
Attunement turns fragmented behavioral health records into structured…
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HQ: San Francisco, CA, United States
What they do:
AI-Powered Engineering Productivity
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HQ: San Francisco, CA, United States
What they do:
Risotto auto-solves IT support requests using AI
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HQ: San Francisco, CA, United States
What they do:
Unlimited inference at $5 per stream
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HQ: San Francisco, CA, United States
What they do:
Deliver complete data analysis from a single question
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HQ: San Francisco, CA, United States
What they do:
Automating home care agency operations with AI
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HQ: San Francisco, CA, United States