Horizon3.ai is a cybersecurity company founded in 2019 that focuses on autonomous penetration testing and security posture assessment. The firm enables organizations to identify and remediate exploitable attack vectors before adversaries can leverage them, addressing persistent industry challenges such as false positives, alert fatigue, and the cybersecurity skills shortage. Its team includes former U.S. Special Operations cyber operators, startup engineers, and cybersecurity practitioners.
The company's primary product is NodeZero™, an autonomous penetration testing platform that continuously assesses security posture across internal, external, cloud, and hybrid environments. The platform is designed to be production-safe, running autonomous pentests without disrupting live systems.
Horizon3.ai serves clients in education, enterprise, and government sectors across North America. The company was named the 3rd fastest-growing firm in North America on the 2025 Deloitte Fast 500 ranking.