Business

Armorer Labs

Website
Founded 2026Origin source ↗Checked 2026-10-26

Overview

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.

Company description As recorded 2026-11-08

Founders & team

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.

Founder profile As recorded 2026-10-26

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.

Founder profile As recorded 2026-10-26
2team members reported
Source-reported As recorded 2026-10-26

Founded 2026 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 2 of 6 areas documented

Source-based assessment · automated evidence rules

The retained text does not establish product availability or customer use.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

  • Product overviewSource description Checked 2026-11-11
  • Product visualsNot documented
  • Founders & originsTeam information
  • Business model & pricingNot documented
  • Funding & ownershipNot documented
  • Dated milestonesNot documented
Stage definitions
independent websitesource corroborationreachable websitedescriptive evidencesourced peoplesourced founding yearrecent publishing observed