HiddenLayer

HiddenLayer is a security platform built specifically for AI systems. It covers four areas: discovery, which inventories the models, applications and AI assets already running in an environment; supply chain security, which scans and validates models before deployment; attack simulation, which continuously tests generative and agentic applications for weaknesses; and runtime security, a firewall that detects and responds to adversarial activity in production. It is aimed at enterprise security teams and government bodies that must approve and monitor AI systems they did not build themselves. The platform is model agnostic and agentless, needs no training data, and does not require access to model weights, prompts or customer data. Prebuilt integrations connect it to CI/CD pipelines, MLOps platforms, data pipelines and SIEM and SOAR tooling. Common uses are scanning third party and proprietary models for hidden risks, continuous red teaming against an organization's own applications, and policy based guardrails that block misuse, data leakage and prompt driven attacks across the AI lifecycle. HiddenLayer does not publish prices. There is no pricing page on the site, and every plan route leads to a demo request, so cost is quoted on request after a sales conversation. The company was founded by security researchers who documented the first malware aimed specifically at machine learning systems. It states that it holds more than 30 issued patents and has disclosed more than 50 CVEs through its research team, and it has announced a $100 million Series B round.