HiddenLayer

HiddenLayer offers a security platform built to protect artificial intelligence models and automated workflows from targeted cyber threats, data exposure, and model tampering. The company provides specialized capabilities such as asset discovery to map enterprise infrastructure, model scanning to detect supply chain vulnerabilities, continuous red teaming for adversarial attack simulations, and real-time runtime protection. These security products monitor inputs and outputs to enforce policy guardrails, prevent prompt injection, and defend autonomous agentic systems without compromising application performance. Organizations across financial services, healthcare, technology, and government sectors use these tools to secure machine learning pipelines, satisfy compliance requirements, and safely deploy artificial intelligence applications at scale.

Security for AI models and agents. ARR 'tens of millions', 10x YoY (TechCrunch, Sep 2026, $100M round); est. ~$30M. Valuation shown is a Lounge estimate at 10x ARR (no reported valuation).