Security vet launches AI-focused startup Umbriel, hacker noperator joins
dyn___ · x · 2026-09-18
Known security figure mdowd announced the launch of Umbriel (@UmbrielAI), a new AI-focused company doing security research in the space. Notable hacker noperator subsequently announced he has joined Umbriel, working alongside mdowd and dyn. The founding team is made up of several seasoned security researchers pointing at AI security infrastructure.
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