Horizon3.ai, a provider of offensive security solutions, announced significant growth in the first half of 2025, with its annual recurring revenue (ARR) increasing by 137% year-over-year, reflecting rising adoption of its NodeZero autonomous pentesting platform.
The company’s annual recurring revenue (ARR) grew by 137% year-over-year in the first half of 2025. Growth in the enterprise segment was particularly strong, expanding 485% year-over-year with deployments across Fortune 250 companies, global healthcare providers, major financial institutions, and critical infrastructure operators. NodeZero’s adoption scaled to nearly 4,000 companies globally, marking a 117% year-over-year increase. To date, Horizon3.ai has conducted over 170,000 autonomous pentests, including a large-scale test for a municipal transportation authority that safely tested more than 100,000 IP addresses in a single run.
NodeZero is being utilized in demanding environments, with customers now including three Fortune Top 10 companies, leading hospital groups in both the U.
S. and EMEA, and two of the nation’s largest school systems. Its client base also encompasses Fortune 500 enterprises in sectors such as financial services, pharmaceuticals, automotive, manufacturing, and technology, as well as a global leader in nuclear fuel enrichment, underscoring its role in protecting critical infrastructure and national defense.
Horizon3.ai’s global reach is expanding through partnerships with NCC Group, Tech Mahindra, and Kyndryl, enabling organizations worldwide to continuously validate their security posture. The company also supports resilience efforts within the federal government and the Defense Industrial Base, serving critical supply chains and civilian agencies. Organizations in these high-stakes sectors reportedly select NodeZero for its ability to provide the necessary scale, safety, and accountability for large enterprises.
The company debuted on the 2025 Inc. 5000 list, securing the #121 overall position and the top spot in Security, driven by a reported 2,962% three-year growth. In 2025, Horizon3.ai also received multiple accolades, including Best SaaS Product for Cybersecurity AI, the AI in Cybersecurity Innovation Award, The Channel Co. MES Computing 2025 Award, the Rising in Cyber Award, and multiple Global InfoSec Awards. Additionally, it was recognized on the Fortune Cyber 60 list for the second consecutive year.
Snehal Antani, CEO and Co-Founder of Horizon3.ai, commented on the platform’s utility, stating, “Risk boils down to three questions: Are you exploitable? What would the business impact be if you are? And are attackers actively using those tactics? Enterprises need clear answers to prioritize action. NodeZero delivers that proof, enabling organizations to focus on what matters most and continuously validate their security posture.”NodeZero is an autonomous pentesting platform designed to continuously verify an organization’s security posture. It operates by identifying exploitable weaknesses, prioritizing fixes based on real-world impact, and verifying remediation at scale, simulating attacker behavior safely within production environments.
