Horizon3.ai raises $250M at $2B-plus valuation for autonomous pentesting

Autonomous security firm Horizon3.ai has successfully closed a $250 million Series E funding round, bringing its valuation to over $2 billion. The company's NodeZero platform performs autonomous penetration testing on customers' networks, identifying vulnerabilities such as weak credentials, misconfigurations, and identity gaps.

NodeZero re-runs tests to confirm the closed path and can also deploy honeypots to detect AI-driven attackers. The platform has expanded its user base to over 6,500 organizations, including the U.S. National Security Agency, four Fortune 10 companies, and multinational banks. Annual recurring revenue grew by 120% year-over-year, with the platform running upwards of 300,000 pentests in production.

The new funding will be used for sales, marketing, and channel hires to expand into Australia, Singapore, and other regions, as well as to develop autonomous blue-team agents. Notable new investors include NightDragon, New Enterprise Associates, Acrew Capital Management, Blue Cloud Ventures, and various private equity firms. CEO Snehal Antani emphasized that the company's AI-driven approach to cybersecurity is reshaping how organizations defend their data.