Horizon3’s NodeZero platform autonomously tests production environments to uncover attack paths created by misconfigurations, weak credentials, and identity gaps, enabling remediation and validation of fixes as the company positions itself at the forefront of the AI-versus-AI cybersecurity era.

The company envisions a continuous learning loop between AI attackers and AI defenders, including automated blue-team agents that can fix issues identified by NodeZero tests.

NodeZero can safely test live systems without disrupting operations and performs full-network scans to provide ongoing, real-time assessments rather than periodic checks.

Investors are signaling confidence in Horizon3’s growth potential, based on past performance and addressable market, though valuations hinge on anticipated future growth.

Strategic backers include Singapore’s EDBI, defense contractor SAIC, and Qualcomm, underscoring cross-industry demand for vulnerability testing beyond traditional cybersecurity.

Horizon3 serves roughly 7,200 to 7,300 customers—from MSPs to Fortune 10 firms—within a global cybersecurity market expected to grow from about $272 billion in 2025 to more than $663 billion by 2033.

Industry context emphasizes that the market is expanding, with Horizon3 stressing real-world production environment testing over lab-based benchmarks as a differentiator.

Funding will scale go-to-market efforts and expand internationally to Singapore, Australia, and broader Europe, the Middle East, and Africa, while accelerating next‑generation product innovations for continuous AI attack-defense learning.

Horizon3 is opening new offices and building a partner network in Amsterdam, Singapore, and Australia to support geographic expansion.

The round was led by NightDragon and NEA, with new investors including Acrew Capital, Blue Cloud Ventures, and Demeter Group; existing backers like Qualcomm Ventures and Craft Ventures also participated, and NightDragon’s Dave DeWalt joins the board.

The round signals strong investor appetite for autonomous cybersecurity solutions and validates Horizon3’s rapid growth trajectory amid global expansion.

Horizon3 reports over 7,000 customers and about $100 million ARR with 120% year-over-year growth, claiming 310,000 production tests without disruption and fourth Fortune 10 clients, while maintaining compliance with standards such as FedRAMP High, HIPAA, GDPR, and NIST frameworks.