Armorer Labs

<!-- hacklab:yc-profile -- YC company profile Continuous security verification for AI agents in regulated industries Armorer helps companies in regulated industries ship their o…

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About Armorer Labs

YC company profile

Continuous security verification for AI agents in regulated industries

Armorer helps companies in regulated industries ship their own AI agents faster and keep them secure in production.

Most security tools flag an issue and file a ticket. Armorer assesses your agent and simulates attacks to find the real issues. Then it creates a verified fix that stops the attack without breaking the business, ready for your approval in about 4 hours.

In production, Armorer checks every agent action in milliseconds, with no GPU needed. It detects malicious behavior such as prompt injection, goal hijacking and data leaks, then allows, holds or denies the action.

Armorer's detection models beat every other detector we tested on six public benchmarks. Armorer is 22% more accurate than JEV while being 88x faster, so users won't feel the delay.

We spent years building and evaluating AI security systems together at AWS, including its first customer-facing AI security agent, which scaled to 100k+ customers. Armorer is backed by Paul Vixie, an internet pioneer inducted into the Internet Hall of Fame in 2014.

YC batch: Fall 2026
Founded: 2026
Team size: 2
Location: San Francisco
Country: US
Status: Active
Industry: B2B
Stage: Early
Tags: Developer Tools, DevSecOps, Cybersecurity, AI
YC partner: Kulveer Taggar

Founders

Daniel Begimher — Founder/CEO

Co-founder of Armorer Labs. Previously led the global Application Security technical field community at AWS, where he led development of AWS Security Incident Response's AI-powered investigative agent from early development through public launch. Author of SIR-Bench - evaluation method for security agents; author of ASH code scanner (200K+ monthly clones); co-created ThreatForest, selected for Black Hat USA 2026 briefing. Led incident response for Fortune 500 breaches and red-team operations.

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Cristian Leo — Founder/CTO

Co-Founder of Armorer Labs (YC F26). Led AI security science at AWS, building and evaluating AI systems for security.

He is the creator of ThreatForest, the first open source automated threat modeling agent, and a co-author of SIR-Bench, a benchmark for evaluating AI security investigations. He is a Black Hat and re:Invent speaker.