What they do:
High performance coding agents
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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 57 of 108
What they do:
The AI gateway for cheaper, faster, permissioned agents.
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HQ: San Francisco, CA, United States
What they do:
AWS for Agents
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HQ: San Francisco, CA, United States
What they do:
On-device Knowledge Graph engine for Enterprise Software
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HQ: San Francisco, CA, United States
What they do:
Managed Agents API
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HQ: San Francisco, CA, United States
What they do:
Connect your agents to the stock market
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HQ: New York, NY, United States
What they do:
The open source tool gateway
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HQ: San Francisco, CA, United States
What they do:
AI that finds and fixes OS-level vulnerabilities across device fleets
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HQ: San Francisco, CA, United States
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:
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:
Always-on AI security engineer
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HQ: San Francisco, CA, United States
What they do:
Insurance Billing APIs for Healthcare Businesses
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HQ: New York, NY, United States
YC S12Growth stage
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:
Marketplace & Software Revolutionizing Yard Care
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HQ: San Francisco, CA, United States
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:
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:
Investing in innovation
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HQ: San Francisco, CA, United States
What they do:
24/7 emergency maintenance department for property managers and…
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HQ: Seattle, WA, United States
What they do:
The email API built for product teams
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HQ: United States
What they do:
Get up and running with large language models.
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HQ: San Francisco, CA, United States
YC W21Growth stage
What they do:
Online University for Tech Professionals
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HQ: San Francisco, CA, United States
What they do:
Easy accounting for e-commerce
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HQ: San Francisco, CA, United States
YC S21Early stage
What they do:
AI copilot for real-estate sales teams, powered by proprietary data
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HQ: Saint Petersburg, FL, United States
YC W22Early stage
What they do:
Find a home you can actually afford
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HQ: New York, NY, United States
YC W22Early stage
What they do:
Remote Shell Access in the Browser
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HQ: San Francisco, CA, United States
YC W23Early stage
What they do:
AI operating system for veterinary care
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HQ: San Francisco, CA, United States
YC W24Early stage
What they do:
Open-source agentic security automation platform
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HQ: New York, NY, United States
YC W24Early stage
What they do:
Generate ads. Iterate till perfect.
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HQ: San Francisco, CA, United States
YC W24Early stage
What they do:
Datasets and evals to push the frontier of visual intelligence.
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HQ: San Francisco, CA, United States
YC W24Early stage
What they do:
An AI agent for scientific research
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HQ: San Francisco, CA, United States
YC S24Early stage
What they do:
Random labs is building long running autonomous coding agents.
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HQ: San Francisco, CA, United States
YC S24Early stage