
Letter AI
What they do:
End-to-end content, learning, & deal intelligence for B2B sales teams
Quick facts:
HQ: Chicago, IL, United States
This list has 1,491 startups and was last updated on Oct 15, 2026. Biggest hubs: San Francisco (784), New York (242), and London (57). Largest teams: DoorDash, Stripe, and EquipmentShare. Latest round: HyLight raised €13M (Oct 12, 2026).

What they do:
End-to-end content, learning, & deal intelligence for B2B sales teams
Quick facts:
HQ: Chicago, IL, United States

What they do:
A leading digital bank in the US offering personal and business…
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HQ: San Francisco, CA, United States

What they do:
Pulley helps founders and finance teams manage their equity and cap…
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HQ: San Francisco, CA, United States

What they do:
Your AI growth hire.
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HQ: Manchester, United Kingdom
Funding:
€2.6M · Oct 2026

What they do:
Payments powering people
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HQ: San Francisco, CA, United States

What they do:
Papyrus → Parchment → Paper → Padlet
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HQ: San Francisco, CA, United States

What they do:
Marketing automation for event promoters (email, sms, ads, CRM)
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What they do:
Mason is the fastest way to take smart devices from idea to end user
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HQ: Seattle, WA, United States

What they do:
The best way to build Voice AI apps
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HQ: New York, NY, United States

What they do:
Collaborative in-browser IDE
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HQ: San Francisco, CA, United States

What they do:
The only work management platform for both Human and AI Employees
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HQ: San Francisco, CA, United States

What they do:
Robotic Automation for cancer diagnostics - Robotic Microscopes &…
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What they do:
BeGo Connects cargo shippers with truck suppliers in Mexico and US
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HQ: San Francisco, CA, United States

What they do:
AI-enabled financial automation and intelligence for CPG Brands
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HQ: New York, NY, United States

What they do:
AI-powered Global Compliance Platform
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HQ: San Francisco, CA, United States

What they do:
The enterprise platform for AI phone calls
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HQ: San Francisco, CA, United States

What they do:
The all-in-one AI platform for companies.
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What they do:
Using AI to help dementia patients age at home
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HQ: New York, NY, United States

What they do:
At-Home health monitoring with silicon photonic chips for data centers
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HQ: Boston, MA, United States

What they do:
Payment Platform for LatAm Micro and Small Businesses
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What they do:
Affordable care via ICHRA and primary care with visits, meds, labs…
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HQ: Philadelphia, PA, United States

What they do:
Collaborative platform for optimizing regulated utilities such as…
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HQ: San Francisco, CA, United States

What they do:
Underwriting automation for small business finance
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HQ: New York, NY, United States

What they do:
Building a better way to meet online.
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HQ: New York, NY, United States

What they do:
Software orchestrated mass production of plastics
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HQ: Cleveland, OH, United States

What they do:
Software for pharmacies to move beyond dispensing
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What they do:
Your AI GTM platform for In-Person Events
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HQ: New York, NY, United States

What they do:
Modernizing commercial insurance
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HQ: San Francisco, CA, United States

What they do:
AI-native commercial real estate operations
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HQ: San Francisco, CA, United States

What they do:
AI Phone Agents for Healthcare Operations
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HQ: New York, NY, United States

What they do:
Operating System for Hotels and Vacation Rentals
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HQ: San Francisco, CA, United States

What they do:
AI-native AML compliance platform for fintechs & banks
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HQ: San Francisco, CA, United States

What they do:
ZiffyHomes is managed corporate housing for white collar employees in…
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What they do:
A digital wallet for the Middle East & North Africa
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What they do:
Datadog for Space
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HQ: Denver, CO, United States

What they do:
AI platform to win and run government contracts
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HQ: New York, NY, United States