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.
The company was founded by Ahmad Khan; Huzaifa Ahmad; Prama Yudhistira. It is part of YC Winter 2026. It is based in San Francisco, CA, USA.