Horizon3.ai Ranked 3rd Fastest-Growing Company in North America on the 2025 Deloitte Technology Fast 500™

Company Attributes 19,939% Three-Year Revenue Growth to Rapid Enterprise Adoption of AI-Powered Offensive Security

SAN FRANCISCO--(BUSINESS WIRE)--Horizon3.ai, the leading provider of offensive security solutions, today announced it ranked third overall on the Deloitte Technology Fast 500™, a ranking of the 500 fastest-growing technology, media, telecommunications, life sciences, fintech, and energy tech companies in North America, now in its 31st year.

“Our growth reflects a major shift in cybersecurity as defenders are now thinking like attackers and adopting the machine-speed solutions needed to outpace threats,” said Snehal Antani, CEO and Co-founder, Horizon3.ai. “Our global team is humbled by this recognition and even more energized by what it signals for the future of our industry.”

This latest recognition further validates the company's notable momentum as the cybersecurity industry has increasingly adopted an offensive mindset and harnessed the power of AI to improve their defenses. Earlier this year, Horizon3.ai was also the number one cybersecurity company listed on the 2025 Inc. 5000 List of America’s Fastest-Growing Private Companies.

“This year’s rankings highlight both enduring leadership and breakthrough momentum,” said Wolfe Tone, US Deloitte Private & Emerging Client Portfolio leader and partner, Deloitte Tax LLP. “More than half of the winners are prior honorees, yet the majority of the top ten are first-time entrants — demonstrating the staying power of established leaders alongside the accelerating growth of new innovators across key sectors. As in previous years, private companies continue to dominate, underscoring the agility that private enterprises bring to competitive markets, enabling the exceptional triple and quadruple digit growth reflected in these rankings.”

Overall, 2025 Technology Fast 500 companies achieved an average growth rate of 1,079%. Horizon3.ai’s meteoric growth is the direct result of enterprise adoption of its proprietary NodeZero® platform. The company now serves nearly 4,500 global organizations (a 117% year-over-year increase), and has successfully executed more than 180,000 autonomous pentests.

About the 2025 Deloitte Technology Fast 500

Now in its 31st year, the Deloitte Technology Fast 500 provides a ranking of the fastest-growing technology, media, telecommunications, life sciences, fintech, and energy tech companies — both public and private — in North America. Technology Fast 500 award winners are selected based on percentage fiscal year revenue growth from 2021 to 2024.

In order to be eligible for Technology Fast 500 recognition, companies must own proprietary intellectual property or proprietary technology that significantly contributes to the company’s operating revenues. Companies must have base-year operating revenues of at least US$50,000, and current-year operating revenues of at least US$5 million, with a growth rate of 50% or greater. Additionally, companies must be in business for a minimum of four years and be headquartered within North America (United States and Canada).

About Horizon3.ai

Horizon3.ai empowers organizations to continuously verify their security posture with NodeZero®, the industry’s leading autonomous pentesting platform. Built to think and act like an attacker — but operate safely in production — NodeZero identifies exploitable weaknesses, prioritizes fixes based on real-world impact and verifies remediation at scale. Customers across manufacturing, healthcare, finance and national security rely on NodeZero to reduce risk and accelerate security outcomes.

Follow Horizon3.ai on LinkedIn and X.

*Please see www.deloitte.com/us/about for a detailed description of their legal structure.