What they do:
Your health plan should get better year-round. Not just once a year.
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HQ: San Francisco, CA, United States
Top B2B Software Startups in California
This list has 2,349 startups and was last updated on Oct 15, 2026. 592 of them are hiring right now. Biggest hubs: San Francisco (2,110), Los Angeles (79), and San Diego (12). Largest teams: Stripe, Deel, and GrubMarket. Latest round: Modal raised $750M (Oct 14, 2026).
2,349 startupsPage 40 of 66
What they do:
Training Data For Speech Models.
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HQ: San Francisco, CA, United States
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Lark - AI agents that automate workflows for wholesale distributors
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HQ: San Francisco, CA, United States
What they do:
Cloud development environments for AI coding
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HQ: San Francisco, CA, United States
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Tumult is building the next generation of apps for web design. Our…
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HQ: San Francisco, CA, United States
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FollowUpThen is an email-based personal assistant that sends you…
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HQ: San Francisco, CA, United States
What they do:
Universal, Pure-GPU HTML Renderer
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HQ: San Francisco, CA, United States
What they do:
Build UI fast.
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HQ: San Francisco, CA, United States
What they do:
Multi-agent AI for physical logistics operations
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HQ: San Francisco, CA, United States
What they do:
Stealth AI Lab
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HQ: San Francisco, CA, United States
What they do:
AI SDR
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HQ: San Francisco, CA, United States
What they do:
Faster processors for solving NP-complete problems
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HQ: San Diego, CA, United States
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AI Agent for Billpay platforms to pay invoices with virtual cards
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HQ: San Francisco, CA, United States
What they do:
Transform Document Workflows with AI Agents
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HQ: San Francisco, CA, United States
What they do:
AI for Human Writing
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HQ: San Francisco, CA, United States
What they do:
The simplest way to extract web data at scale
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HQ: San Francisco, CA, United States
What they do:
Turn product features into launch videos
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HQ: San Francisco, CA, United States
What they do:
Specialized agents for real work
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HQ: Los Angeles, 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
What they do:
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
What they do:
The AI Secretary for Email and Calendar.
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HQ: San Francisco, CA, United States
What they do:
AI agents for global trade compliance
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HQ: San Francisco, CA, United States
What they do:
Agentic AI Security and Governance
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HQ: San Francisco, CA, United States
What they do:
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
What they do:
A robotics intelligence system for metal fabrication
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HQ: San Francisco, CA, United States
What they do:
Interpretability and reasoning infra for foundation models.
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HQ: San Francisco, CA, United States
What they do:
Research lab solving non-verifiable work
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HQ: San Francisco, CA, United States
What they do:
AI-native, hardware procurement marketplace
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HQ: San Francisco, CA, United States
What they do:
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:
AI Data Analyst for fast-growing teams
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HQ: San Francisco, CA, United States