What they do:
The AI coding agent for C and C++
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HQ: San Francisco, CA, United States
Top B2B Software Startups in the United States
This list has 3,865 startups and was last updated on Oct 15, 2026. 827 of them are hiring right now. Biggest hubs: San Francisco (2,110), New York (555), and Los Angeles (79). Largest teams: Stripe, Deel, and GrubMarket. Latest round: Onebrief raised $151M (Oct 14, 2026).
3,865 startupsPage 55 of 108
What they do:
The infrastructure to run coding agents for your team
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HQ: San Francisco, CA, United States
What they do:
AI agents that run law firm operations.
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HQ: San Francisco, CA, United States
What they do:
The people data company for the agent era
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HQ: San Francisco, CA, United States
What they do:
API simulators for testing and training agents locally
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HQ: San Francisco, CA, United States
What they do:
A foundation model for engineering physics
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HQ: San Francisco, CA, United States
What they do:
Turn any website into an MCP for your agents, in minutes
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HQ: San Francisco, CA, United States
What they do:
AI Claims Investigator for Insurance
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HQ: New York, NY, United States
What they do:
Open source alternative to Semrush and Ahrefs
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HQ: Boston, MA, United States
What they do:
Reconero helps police officers automate their workflows with AI
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HQ: San Francisco, CA, United States
What they do:
The AI decision engine for factories, warehouses and fleets
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HQ: San Francisco, CA, United States
What they do:
reducing agent reasoning into a graph search problem
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HQ: San Francisco, CA, United States
What they do:
Durable state for AI agents
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HQ: New York, NY, United States
What they do:
Cursor for GTM
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HQ: San Francisco, CA, United States
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
What they do:
Training Data For Speech Models.
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HQ: San Francisco, CA, United States
What they do:
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
What they do:
Tumult is building the next generation of apps for web design. Our…
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HQ: San Francisco, CA, United States
What they do:
FollowUpThen is an email-based personal assistant that sends you…
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HQ: San Francisco, CA, United States
What they do:
Helping software developers find teams that share their values.
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HQ: Seattle, WA, 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:
Robust & recursively self-improving general intelligence
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HQ: New York, NY, United States
What they do:
Incredibly reliable background task queues and cron jobs
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HQ: Austin, TX, 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
What they do:
AI Agent for Billpay platforms to pay invoices with virtual cards
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HQ: San Francisco, CA, United States
What they do:
Create, edit, and share procedural material graphs.
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HQ: Pittsburgh, PA, 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:
Embed charts, dashboards and exports in your app
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HQ: Austin, TX, United States
What they do:
Turn product features into launch videos
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HQ: San Francisco, CA, United States