At Horizon3.ai, we envision a future where enterprises no longer react to cyber threats but anticipate and neutralize them before they manifest. Our mission is to transform cybersecurity through relentless automation and AI intelligence, enabling continuous, attacker-informed validation of defenses across complex networks and infrastructures.
Built on the expertise of military cyber specialists and engineers, our autonomous platform harnesses real-world attacker perspectives to reveal hidden vulnerabilities at machine speed. By pioneering proactive security, we empower organizations to shift from a cycle of endless patching to strategic resilience, unlocking a new era of digital trust and protection.
We are committed to scaling this vision globally, equipping every security team with AI-driven tools that redefine how risk is managed in an ever-evolving cyber landscape — forging stronger defenses that safeguard the future of business and information.
Our Review
We've been watching Horizon3.ai for a while now, and honestly, they've got something special brewing. This isn't your typical cybersecurity startup throwing around buzzwords — it's a company built by people who've actually been in the trenches of cyber warfare. When your founding team includes veterans from U.S. Special Operations and military cyber experts, you know they understand what real threats look like.
The "Think Like a Hacker" Approach
What caught our attention immediately is how Horizon3.ai flips the script on traditional security testing. Instead of waiting around for vulnerabilities to surface, their NodeZero® platform actively hunts for weaknesses like an actual attacker would. It's not just scanning for known issues — it's literally performing thousands of autonomous penetration tests, thinking several steps ahead like a human hacker.
This isn't theoretical either. They've run over 150,000 autonomous pentests and secured 3,000+ organizations. Those aren't small numbers for a company that's only been around since 2019.
Why the Numbers Matter
Here's where things get impressive: 2,900% revenue growth since 2021 with sustained ARR growth above 100% year-over-year. In the crowded cybersecurity space, that kind of traction suggests they're solving a real problem that organizations desperately need fixed. The recent $100 million Series D round led by NEA backs up what we're seeing in the market.
Getting FedRAMP authorization is no joke either — that's the government saying "yes, we trust this platform with sensitive federal data." For a relatively young company, that's a significant validation.
Who Should Pay Attention
We think Horizon3.ai is particularly compelling for large enterprises drowning in manual pentesting backlogs. If you're a CISO trying to scale security validation without hiring an army of consultants, this autonomous approach makes sense. MSSPs should definitely take a look — the platform could transform how they deliver services to clients.
The Fortune Cyber 60 recognition and Black Unicorn Awards finalist status don't hurt either. Sometimes the industry gets it right when spotting the next big thing.
Features
Autonomous penetration testing platform
Continuous identification and verification of vulnerabilities
Simulates real-world attacks
AI-driven automation for security validation
Scalable risk assessment and remediation prioritization
Jobs
FAQs
Ploy was founded in 2024.
Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up? And, how do we withstand the onslaught of AI-powered attacks? Horizon3.ai’s NodeZero® shifts the advantage from attackers to defenders by giving organizations the power to fight AI with AI. The Proactive Security Platform autonomously tests your defenses at machine speed, safely finds and prioritizes exploitable attack paths, instantly verifies fixes, and drives a continuous loop so you can prove you’re resilient, not just hope you are. NodeZero, the World’s Best AI Hacker™, was built by an elite team of U.S. cyber veterans and has honed its skills over 225K production-safe tests, more than all manual pentests in history. More than 5,000 organizations including the NSA, CISA, Fortune 100 giants, and major healthcare providers trust Horizon3.ai to prioritize what matters and prove they’re ready for what’s next. Horizon3.ai has been recognized by Fast Company as one of the World’s Most Innovative Companies in 2026. The company ranked #3 overall on the 2025 Deloitte Technology Fast 500 and was named the #1 cybersecurity company on the Inc. 5000 in 2025. It has also been named to the Fortune Cyber 60 in both 2023 and 2025 and is a two-time Black Unicorn Award winner.
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