Horizon3 Raises $250M in Series E to Reach $2B Valuation

Cybersecurity firm Horizon3 has closed a $250 million funding round that values the company at $2 billion, according to a statement released by the startup. The investment, led by a consortium of venture capital and strategic investors, comes as Horizon3 expands its AI‑driven security validation platform, which is designed to provide continuous assessment of software and infrastructure rather than the traditional annual penetration testing model.

Industry analysts note that the shift toward real‑time, AI‑powered security checks reflects growing pressure on enterprises to detect and remediate vulnerabilities before they can be exploited. Horizon3’s platform uses machine learning to automatically scan code, configurations, and network traffic, delivering actionable insights to developers and security teams on an ongoing basis. The company’s growth has attracted significant capital as firms seek to streamline security workflows and reduce the lag between vulnerability discovery and patching.

With the new capital, Horizon3 plans to accelerate product development, expand its customer base, and enhance its AI capabilities. The funding underscores the broader trend of increased investment in continuous security solutions, positioning Horizon3 as a key player in the evolving cybersecurity landscape.