Horizon3.ai Ranks No. 121 on the 2025 Inc. 5000 List of America’s Fastest-Growing Private Companies

With Three-Year Revenue Growth of 2,962 Percent, This Marks Horizon3.ai’s First Time on the List

NEW YORK--(BUSINESS WIRE)--Inc., the leading media brand and playbook for the entrepreneurs and business leaders shaping our future, today announced that Horizon3.ai is No. 121 on the annual Inc. 5000 list, the most prestigious ranking of the fastest-growing private companies in America. The list provides a data-driven snapshot of the most successful companies within the economy’s most dynamic segment—its independent, entrepreneurial businesses. Past honorees include companies such as Microsoft, Meta, Chobani, Under Armour, Timberland, Oracle, and Patagonia.

“Our growth reflects more than just market demand. It's proof that organizations are ready to use AI Hackers to improve their defenses,” said Snehal Antani, CEO and co-founder of Horizon3.ai. “By enabling organizations to see themselves through the eyes of an attacker, organizations are able to prioritize and quickly fix security problems that matter. Ranking No. 1 in Cybersecurity on the Inc. 5000, and ranking No. 121 overall, is a milestone for our team, but it’s also a signal that offensive security is becoming a core part of every modern security program.”

This year’s Inc. 5000 honorees have demonstrated exceptional growth while navigating economic uncertainty, inflationary pressure, and a fluctuating labor market. Among the top 500 companies on the list, the median three-year revenue growth rate reached 1,552 percent, and those companies have collectively added more than 48,678 jobs to the U.S. economy over the past three years.

For the full list, company profiles, and a searchable database by industry and location, visit: www.inc.com/inc5000.

“Making the Inc. 5000 is always a remarkable achievement, but earning a spot this year speaks volumes about a company’s tenacity and clarity of vision,” says Mike Hofman, editor-in-chief of Inc. “These businesses have thrived amid rising costs, shifting global dynamics, and constant change. They didn’t just weather the storm—they grew through it, and their stories are a powerful reminder that the entrepreneurial spirit is the engine of the U.S. economy.”

Inc. will celebrate the honorees at the 2025 Inc. 5000 Conference & Gala, taking place October 22–24 in Phoenix, and the top 500 will be listed in the Fall issue of Inc. magazine.

About Horizon3.ai

Horizon3.ai’s NodeZero® Offensive Security Platform enables organizations to continuously identify, exploit, and remediate real-world weaknesses across on-premises, cloud, and hybrid environments. In the past year alone, the company has expanded its customer base across multiple industries, accelerated the integration of emerging threat intelligence, and launched six new risk-based vulnerability management (RBVM) capabilities — Endpoint Security Effectiveness, Advanced Data Pilfering, High-Value Targeting, MCP Server, Vulnerability Management Hub, and Threat Actor Mapping — to help customers prioritize and validate fixes with even greater precision. Founded in 2019 by former U.S. Special Operations and cybersecurity experts, Horizon3.ai is trusted by enterprises, critical infrastructure providers, and government agencies to strengthen their security posture through real attacker validation.

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Methodology

Companies on the 2025 Inc. 5000 are ranked according to percentage revenue growth from 2021 to 2024. To qualify, companies must have been founded and generating revenue by March 31, 2021. They must be U.S.-based, privately held, for-profit, and independent—not subsidiaries or divisions of other companies—as of December 31, 2024. (Since then, some on the list may have gone public or been acquired.) The minimum revenue required for 2021 is $100,000; the minimum for 2024 is $2 million. As always, Inc. reserves the right to decline applicants for subjective reasons.

About Inc.

Inc. is the leading media brand and playbook for the entrepreneurs and business leaders shaping our future. Through its journalism, Inc. aims to inform, educate, and elevate the profile of its community: the risk-takers, the innovators, and the ultra-driven go-getters who are creating the future of business. Inc. is published by Mansueto Ventures LLC, along with fellow leading business publication Fast Company. For more information, visit www.inc.com.