HiddenLayer

HiddenLayer is an independent AI security company whose AISec Platform protects ML models across discovery, supply-chain security, runtime defense, and attack simulation, with detections mapped to MITRE ATLAS and OWASP. Founded in 2022 in Austin and backed by roughly $56M (including a $50M Series A), it targets enterprises and public-sector buyers. Pricing is enterprise custom; it remains independent as of August 2026.

HiddenLayer focuses on protecting machine-learning models from adversarial threats such as model theft, evasion, data poisoning, and prompt injection. Its AISec Platform (version 2.0 announced in 2025) spans four areas: AI discovery (inventorying models and AI assets), AI supply-chain security (scanning models and artifacts for risks), runtime defense (detecting and blocking attacks against deployed models), and attack simulation (red-teaming AI systems). A distinctive early product was model-scanning and runtime monitoring that treats the model itself as an attack surface. The company sells primarily to enterprises and public-sector organizations with meaningful AI deployments and compliance requirements, mapping detections to frameworks like MITRE ATLAS and OWASP. It has pursued government work, including a 2025 Missile Defense Agency contract award, reflecting a focus on high-assurance environments. HiddenLayer was founded in 2022 and is based in Austin, Texas. It raised a $50M Series A in 2023 led by M12 (Microsoft's venture fund) and Moore Strategic Ventures, with participation from Booz Allen, IBM, and Capital One ventures arms, bringing total funding to roughly $56M. Unlike several peers, HiddenLayer remains an independent company as of August 2026. Pricing is enterprise and custom.