Horizon3 AI, Inc.

Horizon3.ai is a cybersecurity company specializing in autonomous security solutions, with a core mission to enable organizations to proactively defend their infrastructure by adopting an attacker's perspective. Founded in 2019, the company is headquartered in San Francisco, California.

The company's flagship offering is the NodeZero® Autonomous Security Platform, a self-service SaaS solution that performs continuous autonomous penetration testing across various environments, including internal, external, cloud, Kubernetes, and web applications. NodeZero identifies exploitable weaknesses, misconfigurations, and attack paths without requiring agents or credentials, providing actionable insights for remediation. Horizon3.ai serves a diverse market, including enterprises, Managed Security Service Providers (MSSPs), and the public sector, with a focus on federal agencies and the Defense Industrial Base.

Led by Co-Founder and CEO Snehal Antani, Horizon3.ai has established itself as a leader in AI-native proactive security. The company secured $100 million in Series D funding in June 2025, bringing its total funding to $178.5 million. This funding supports global expansion, enhanced product capabilities, and increased federal market presence. Horizon3.ai reported 102% year-over-year Annual Recurring Revenue (ARR) growth in FY2026 and has been recognized on the Fortune Cyber 60 list, underscoring its strong market positioning and innovative approach to cybersecurity.