HiddenLayer nabs $100M as enterprises rush to secure their AI deployments

AI security startup HiddenLayer raised $100M, three years after its $50M Series A. Back then, real-world AI attacks at scale were hard to find. Now security vendors are racing to build products that monitor AI agents and the tools they use. The post doesn't disclose valuation or lead investor, but notes the risk of agents going haywire in production is real even if public exploits remain rare.

Why it matters: HiddenLayer's $100M round is sizable for AI security, and the article shifts the threat narrative from models to agents and toolchains — a real knowledge gain. Missing valuation and lead investor details keep it from the 78+ band.