Armorer Labs
YC F26San Francisco, US · Founded 2026 · 2 employees · 1 known investors
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Armorer Labs provides continuous security verification for AI agents, testing them with simulated attacks, generating verified fixes, and monitoring each agent action in production to detect and block threats like prompt injection, goal hijacking, and data leaks. It serves companies in regulated industries that are deploying their own AI agents.
AI & Machine LearningCybersecurityDeveloper ToolsEnterprise SoftwareDevSecOpsAIUnited States of AmericaAmerica / Canada
Founders & leadership· Y Combinator alumni (F26)
DB

Daniel BegimherFounder/CEOHe previously led the global application security technical field community at AWS, where he contributed to building an AI-powered investigative agent for AWS Security Incident Response, and has worked on security agent evaluation methods, code scanning tools, incident response for large enterprises, and red-team operations.
CL
Cristian LeoFounder/CTOCristian Leo is Founder/CTO of Armorer Labs (YC F26) and previously led AI security science at AWS, where he built and evaluated AI systems for security. He created ThreatForest, an open source automated threat modeling agent, co-authored SIR-Bench (a benchmark for evaluating AI security investigations), and has spoken at Black Hat and re:Invent.
Investors · 1
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Frequently asked questions
- What does Armorer Labs do?
- Armorer Labs provides continuous security verification for AI agents, testing them with simulated attacks, generating verified fixes, and monitoring each agent action in production to detect and block threats like prompt injection, goal hijacking, and data leaks. It serves companies in regulated industries that are deploying their own AI agents.
- Who are Armorer Labs's investors?
- Armorer Labs's investors include Y Combinator.
- Where is Armorer Labs headquartered?
- Armorer Labs is headquartered in San Francisco, US.

