Key facts
- Funding: HiddenLayer raised a US$100m Series B in September 2026 led by Delta-v Capital, with Ten Eleven Ventures, Morgan Stanley, M12 and Booz Allen Ventures.
- Growth: Annual recurring revenue grew more than tenfold in the year before the round, and HiddenLayer signed more than 50 new platform customers.
- Patents: HiddenLayer has 39 granted patents and 65 more pending.
Focus areas
About
HiddenLayer secures agentic, generative and predictive AI applications, from discovery and AI supply chain security to attack simulation and runtime protection. In the year before its Series B it signed more than 50 new platform customers, including firms in banking, brokerage and insurance. In September 2026 it raised US$100m led by Delta-v Capital. Chris Sestito is co-founder and chief executive, and Mike Gesnaldo is chief revenue officer. The company plans to expand in Europe and the wider EMEA region.
How they use AI
Agentic Runtime Security protects AI agents while they run in production. Agent Harness Security extends runtime protection to AI coding agents that write, review and ship code. The wider platform covers discovery of AI assets, AI supply chain security, attack simulation and runtime protection.
Products and services
- AI Security Platform — Discovery, supply chain security, attack simulation and runtime protection for AI
- Agentic Runtime Security — Live monitoring and blocking of risky AI agent actions
- Agent Harness Security — Runtime protection for autonomous coding agents
Key people
- Chris Sestito — Co-founder and CEO
- Mike Gesnaldo — Chief Revenue Officer
