
Callab AI
What they do:
AI voice agents for on-prem telephony stack.
Quick facts:
HQ: San Francisco, CA, United States
This list has 825 startups and was last updated on Oct 15, 2026. 205 of them are hiring right now. Biggest hubs: San Francisco (587), New York (68), and London (19). Largest teams: Zerocater, Human Archive, and Perit.AI. Latest round: Beyond Reach Labs raised $10M (Oct 6, 2026).

What they do:
AI voice agents for on-prem telephony stack.
Quick facts:
HQ: San Francisco, CA, United States

What they do:
Agentic hiring marketplace
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HQ: San Francisco, CA, United States

What they do:
AI Back-Office Automation for Commercial Lenders
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HQ: San Francisco, CA, United States

What they do:
Robotics
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HQ: San Francisco, CA, United States

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Run any coding agent harness in the cloud
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HQ: San Francisco, CA, United States

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AI-native CRO for clinical trial operations
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HQ: San Francisco, CA, United States

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Your Capable Desktop AI Companion
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HQ: Irvine, CA, United States

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Logistics infrastructure to modernize healthcare operations
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HQ: Washington, DC, United States

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Near-real-time video infrastructure for LLMs
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HQ: San Francisco, CA, United States

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Satellites for Manufacturing in Space
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HQ: San Francisco, CA, United States

What they do:
communication for agents
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HQ: San Francisco, CA, United States

What they do:
The autonomous ERP for every manufacturer
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HQ: New York, NY, United States

What they do:
Your startup's financial advisor
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What they do:
Vanta for hardware
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HQ: San Francisco, CA, United States

What they do:
AI Workforce for Distributors and Manufacturers
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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:
Scalable windows desktop automations
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HQ: San Francisco, CA, United States

What they do:
Plan mode for complex features
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What they do:
Building self-improving software
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HQ: San Francisco, CA, United States

What they do:
Building AGI that can innovate.
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HQ: Remote

What they do:
Real-time interaction models for voice agents
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What they do:
Compression middleware that improves LLM outputs
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HQ: San Francisco, CA, United States

What they do:
AI automated prior-auths for private medical practices
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HQ: Seattle, WA, United States

What they do:
Use Claude Code at 47% less cost in one line of installation.
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HQ: San Francisco, CA, United States

What they do:
AI Cost Management: Track and attribute AI spend across every provider
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HQ: San Francisco, CA, United States

What they do:
Unified prediction markets trading platform
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HQ: San Francisco, CA, United States

What they do:
Camera-free AI glasses. Your AI, out in the world.
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HQ: San Francisco, CA, United States

What they do:
Reasoning and verification infra for AI
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HQ: New York, NY, United States

What they do:
Counter Drone Systems. $1.6m sales. We delivered for the DoW.
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HQ: Austin, TX, United States

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Autonomous OS for healthcare
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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

What they do:
Agentic Messenger
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What they do:
AI automations that implement themselves
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HQ: New York, NY, United States

What they do:
Foundation models for planning orthopedic surgery
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HQ: San Francisco, CA, United States

What they do:
The P&L for knowledge work
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HQ: San Francisco, CA, United States

What they do:
AI EMR for medspas & wellness clinics
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HQ: New York, NY, United States