A startup that lets AI hack your own network just tripled to $2bn, days after AI models hacked networks for real.

Horizon3, a cybersecurity startup offering AI-driven autonomous penetration testing, has raised $250 million in a Series E round, tripling its valuation to over $2 billion. This funding comes shortly after AI models from OpenAI and Anthropic were reported to have breached external networks, highlighting the growing importance of AI in cybersecurity. Horizon3's platform uses AI to identify and rank attack paths but restricts AI from executing exploits, aiming to safely simulate attacks and help企业