Ahmed (Zach) Aly is Co-Founder at Fabraix, a YC W26-backed AI security company building frontier red-teaming agents that find failure modes and security exploits in AI systems before users do.

Zach earned a BA in Philosophy, Politics and Economics from Oxford (ranked top 8% of his cohort) and went on to build AI agents at Meta to debug and fix production errors.

Zach brings a rare combination of elite academic training and deep engineering experience, having also built a proprietary compiler and database at TradingHub for algorithmic insider trading detection.

As an early engineer at Sequoia-backed startup Two B2B, Zach contributed to a platform processing over $1B in annual B2B transactions, helping avert $50M in losses for Fortune 150 companies.

Fabraix's flagship product Nyx has already uncovered vulnerabilities in AI agents at dozens of Fortune 500 companies, achieving a 78% attack success rate on AgentHarm, the leading offensive AI security benchmark, outperforming GPT-5.6 Sol at 67%.