What they do:
ai
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HQ: San Francisco, CA, United States
Top Startups in California
This list has 3,698 startups and was last updated on Oct 15, 2026. 827 of them are hiring right now. Biggest hubs: San Francisco (3,173), Los Angeles (197), and San Diego (39). Largest teams: DoorDash, Stripe, and Airbnb. Latest round: Renue Life Sciences raised $250K (Oct 14, 2026).
3,698 startupsPage 59 of 103
What they do:
Transform Document Workflows with AI Agents
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HQ: San Francisco, CA, United States
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AI for Human Writing
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HQ: San Francisco, CA, United States
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The simplest way to extract web data at scale
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HQ: San Francisco, CA, United States
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Turn product features into launch videos
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HQ: San Francisco, CA, United States
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Specialized agents for real work
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HQ: Los Angeles, CA, United States
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Building and Protecting an Exciting Future
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HQ: Los Angeles, CA, United States
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Fun with AI video
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HQ: San Francisco, CA, United States
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Autonomous Companies Run by AI Working While You Sleep.
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HQ: San Francisco, CA, United States
What they do:
Make your LLMs 3x faster.
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HQ: San Francisco, CA, United States
What they do:
100x faster scientific evidence synthesis
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HQ: San Francisco, CA, United States
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Turning messy inboxes into ERP-Ready Data
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HQ: San Francisco, CA, United States
What they do:
Verify AI-generated code before you ship it
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HQ: San Francisco, CA, United States
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Empowering Physical Therapists to Go Independent
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HQ: San Francisco, CA, United States
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The AI Secretary for Email and Calendar.
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HQ: San Francisco, CA, United States
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AI agents for global trade compliance
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HQ: San Francisco, CA, United States
What they do:
AI for the physical world
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HQ: Los Angeles, CA, United States
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Agentic AI Security and Governance
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HQ: San Francisco, CA, United States
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Units builds full-stack AI education infrastructure.
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HQ: San Francisco, CA, United States
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Your new AI-powered math tutor.
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HQ: San Francisco, CA, United States
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The AI forecasting company for global macro events.
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HQ: San Francisco, CA, United States
What they do:
ChatGPT's memory feature in an open, portable format
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HQ: San Francisco, CA, United States
What they do:
The tiny computer built for voice AI.
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HQ: San Francisco, CA, United States
What they do:
Make your product AI native by tomorrow.
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HQ: San Francisco, CA, United States
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A robotics intelligence system for metal fabrication
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HQ: San Francisco, CA, United States
What they do:
Accelerated Physics Kernels for Computational Engineering
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HQ: San Francisco, CA, United States
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Interpretability and reasoning infra for foundation models.
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HQ: San Francisco, CA, United States
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Research lab solving non-verifiable work
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HQ: San Francisco, CA, United States
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AI-native, hardware procurement marketplace
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HQ: San Francisco, CA, United States
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We automate the inventory process in insurance
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HQ: San Francisco, CA, United States
What they do:
Evals for frontier research agents
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HQ: San Francisco, CA, United States
What they do:
Tankless Dive Gear - Breath Autonomy at Sea, Land & Space
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HQ: San Francisco, CA, United States
What they do:
AI Data Analyst for fast-growing teams
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HQ: San Francisco, CA, United States
What they do:
Everything your team ships, explained to everyone it affects.
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HQ: San Francisco, CA, United States
What they do:
The browser for agentic development
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HQ: San Francisco, CA, United States
What they do:
The operating system for tech startups.
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HQ: San Francisco, CA, United States