Horizon3 Raises $250M Series E at $2 Billion Valuation Amid Rising AI Security Concerns
Cybersecurity startup Horizon3 has secured a $250 million Series E funding round, valuing the company at $2 billion. This marks more than triple its valuation in just over a year and reflects growing demand for AI-driven security solutions as breaches from major AI labs raise concerns about uncontrolled systems. The firm's NodeZero platform offers continuous infrastructure testing without disrupting operations—unlike traditional tools that often require system shutdowns or annual assessments covering only small portions of networks. Horizon3 reported nearly $100 million in annual recurring revenue last year with 120% YoY growth and plans to accelerate further this year. With AI-driven attacks increasing, enterprises are seeking more frequent and comprehensive security testing. The company has run over 310,000 tests without disruptions and is expanding globally into Amsterdam, Australia, and Singapore in the coming years.
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Topics: ai cybersecurity startup funding