What they do:
Autonomous AI defense system for cyber attack
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HQ: San Francisco, CA, United States
Top Security Startups
This list has 156 startups and was last updated on Oct 15, 2026. 41 of them are hiring right now. Biggest hubs: San Francisco (95), New York (20), and Tel Aviv (5). Largest teams: Vanta, TRM Labs, and Authy. Latest round: ZeroPath raised $7.03M (Mar 23, 2026).
156 startupsPage 3 of 5
What they do:
AI cybersecurity for financial institutions' digital assets
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What they do:
Least cost routing system to reduce 70%+ token spend
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HQ: San Francisco, CA, United States
What they do:
Easiest way to set up Zero Trust Access for your team
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HQ: San Francisco, CA, United States
What they do:
Zero-Knowledge security without seed phrases or backup codes
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HQ: Denver, CO, United States
What they do:
Detect every data leak into third-party GenAI tools
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HQ: San Francisco, CA, United States
What they do:
Risotto auto-solves IT support requests using AI
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HQ: San Francisco, CA, United States
What they do:
AI infrastructure for biosecurity
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HQ: New York, NY, United States
What they do:
Continuous AI pentesting that finds and fixes vulnerabilities
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HQ: San Francisco, CA, United States
What they do:
Protect, monitor and defend your Internet presence
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HQ: New York, NY, United States
What they do:
AI for Corporate Security Cameras
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HQ: San Francisco, CA, United States
What they do:
Frontier AI Defenses for Social Engineering Attacks
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HQ: San Francisco, CA, United States
What they do:
Autonomous Runtime Security
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What they do:
Cloud Native SIEM (alternative to Splunk/Elastic)
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HQ: Seattle, WA, United States
What they do:
Agents that handle security work
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HQ: New York, NY, United States
What they do:
Security for AI-native developers
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HQ: San Francisco, CA, United States
What they do:
ai-native security engineering for mission critical codebases
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HQ: San Francisco, CA, United States
What they do:
The AI Security Engineer to Find and Fix Vulnerabilities
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HQ: London, United Kingdom
What they do:
Visibility and Controls for Browser Agents
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HQ: San Francisco, CA, United States
What they do:
Privileged Access Management for AI Agents
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HQ: New York, NY, United States
What they do:
The sensitive data redaction layer for AI
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HQ: San Francisco, CA, United States
What they do:
AI Agents for Platform Engineering
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HQ: San Francisco, CA, United States
What they do:
The control plane for AI agents.
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HQ: San Francisco, CA, United States
What they do:
Real time intelligence for law enforcement & security teams.
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HQ: San Francisco, CA, United States
What they do:
CrowdStrike for AI Agents
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HQ: San Francisco, CA, United States
What they do:
The world's frontier hacker of AI agents.
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HQ: San Francisco, CA, United States
What they do:
Training company-specific models that approve AI actions.
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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 Authorization Layer for AI Agents
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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:
Catch wrong LLM answers before your customers do
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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:
Detect Gunshots | Inform Law Enforcement | Empower First Responders
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HQ: New York, NY, United States
YC W16Early stage
What they do:
Open-source agentic security automation platform
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HQ: New York, NY, United States
YC W24Early stage
Sqreen
Acquired
What they do:
Sqreen is the application security platform for the modern enterprise
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HQ: San Francisco, CA, United States
Authy
Acquired
What they do:
Authy is a Two-Factor Authentication platform for developers
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HQ: San Francisco, CA, United States