Parameter builds AI agents that run continuous penetration tests against your apps and infrastructure. Instead of a once-a-year penetration test, Parameter's agents works 24/7 to find and verify critical vulnerabilities so you can prevent them before attackers. Formerly Hex Security
From the launch
Hex Security builds AI agents that autonomously find security vulnerabilities in production systems. Backed by Y Combinator (W26). Learn more at hex.co Parameter: YC Winter 2026: Parameter: AI that Hacks before Attackers do
