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AI security startups AIR and HiddenLayer raised venture funding to expand tools for securing enterprise AI agents, models, and workflows

Funding Provisional 35% confidence first seen

AIR emerged from stealth and raised $50 million to monitor and vet AI agents’ skills, plugins, and add-ons in enterprise environments, aiming to block risky tool interactions. HiddenLayer raised $100 million to expand AI security coverage for models, agents, and workflows, including runtime and supply-chain protections against threats such as prompt injection and agent manipulation.

AIR HiddenLayer Booz Allen Hamilton Delta-v Capital M12 Microsoft Morgan Stanley OpenAI Ten Eleven Ventures prompt injection

The deal

AIR $50M Seed · announced 1 Sep 2026

Deal terms as reported in the coverage below.

Source coverage

AIR raises $50M to help companies vet the skills and add-ons AI agents use TechCrunch independent HiddenLayer nabs $100M as enterprises rush to secure their AI deployments TechCrunch independent

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