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Lead DevelopmentFACT · 4/5•27 Aug '26•Via CNBC Technology

116 Entities Join AI Cyber-Defense Letter

At least 116 companies and entities — with some reports putting the signatory count above 130 — published an open letter hosted on OpenAI calling for a coordinated global cyber‑defense strategy in response to anticipated, more sophisticated AI‑driven attacks. Signatories include OpenAI, Anthropic, Google, Microsoft, CrowdStrike, Cloudflare, AMD and Hugging Face. The letter urges governments to fund and coordinate defenses, make protections accessible to under‑resourced critical infrastructure (hospitals, water treatment), equip security teams with AI‑powered defensive tools, and adopt measures such as observability for autonomous agents, authorized stress tests, private vulnerability disclosure and verified fixes. The appeal follows recent AI‑linked breaches and has drawn criticism (Engadget) that it could act as promotion for vendors’ security products and reinforce large providers’ market positions.

•At least 116 companies signed the open letter (some reports say 130+), hosted on OpenAI, calling for a coordinated global cyber‑defense strategy.
•Notable signatories include OpenAI, Anthropic, Google, Microsoft, CrowdStrike, Cloudflare, AMD and Hugging Face.
•The letter warns AI‑driven, agentic cyberattacks will grow in sophistication and cites recent AI‑linked breaches.

Entities:OpenAI Anthropic Microsoft Hugging Face CrowdStrike Palo Alto Networks Okta TargetVideo t3n AMD Cloudflare Google

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