Armadin has announced a record-breaking $189.9m combined Seed and Series A funding round aimed at helping organisations defend against increasingly sophisticated AI-driven attacks.
The investment was led by Accel, with participation from Google Ventures, Kleiner Perkins, Menlo Ventures and In-Q-Tel. Existing investors 8VC and Ballistic Ventures also joined the round with follow-on backing. According to the company, the deal represents the largest combined Seed and Series A funding round ever recorded in the cybersecurity sector.
Armadin is developing a platform designed to help organisations identify and respond to security risks at machine speed.
As cyber threats evolve through the use of artificial intelligence, the company argues that traditional human-led defences are struggling to keep pace. Its platform aims to bridge this gap by using autonomous systems capable of detecting vulnerabilities, validating potential exploits and supporting remediation before attackers can act.
The technology centres around what the firm describes as an “agentic attacker swarm”, a network of specialised AI agents that emulate the behaviour of advanced human threat actors. Instead of simply scanning for weaknesses, the system continuously analyses and adapts to an organisation’s infrastructure, identifying real-world exploit paths and presenting decision-ready intelligence to executives and security leaders.
The newly secured capital will be used to expand the company’s platform, accelerate research and development in AI-driven security models and scale operations to support enterprises facing rapidly evolving cyber risks. The funding is also expected to support hiring across engineering and security research teams as Armadin continues to refine its approach to autonomous cyber defence.
Armadin argues that the growing use of AI among malicious actors is creating a new category of cyber campaigns referred to as “Hyperattacks”, where multiple attack methods are coordinated at machine speed. These attacks can move faster than human analysts are able to respond, forcing organisations to rethink how security is managed.
The company’s founding team brings together experienced red team security professionals alongside AI researchers and engineers. Armadin is led by CEO Kevin Mandia, a well-known figure in cybersecurity who maintains longstanding relationships with major enterprises, federal law enforcement bodies and defence organisations.
Armadin CEO Kevin Mandia said, “The AI shift is changing cybersecurity more rapidly than any transition in history. In a world of machine-speed attacks, defense must become autonomous. You cannot have a human in the loop for every defense decision and expect to win. We are building the most formidable offense to give organizations the greatest defense. It’s important to national security.”
Accel partner Ping Li said, “At Accel, we look for companies that don’t just participate in the market, but redefine it. Armadin is the first company we’ve seen that truly weaponizes the attacker’s perspective to build a more resilient defense. By combining Kevin’s unrivaled operational experience with a generational AI engineering team, Armadin is delivering the autonomous, comprehensive system of record for an enterprise’s security posture that boards and CISOs have been demanding for years.”
Armadin founder and chief offensive security officer Evan Peña said, “The most honest measure of security has always been the offensive lens. At Armadin, we are taking decades of human-led red teaming expertise and reinforcing it into AI models. These models are learning our tactics and techniques and are outpacing our human operators at every turn.”
Armadin founder and chief technology officer Travis Lanham said, “Security expertise is a constrained resource that organizations never have enough of in the moments when it matters most. Before Armadin, you could not put a nation-state level adversary inside every network 24/7.
“We’ve built the ultimate attacker – it doesn’t just follow a script, it reasons and learns as it swarms your defenses. We train our models and build agents to the standards of a world-class red team with safety at the foundation and unleash them to identify exploitable risk at machine speed. We believe that this is the only way to prepare for the coming wave of AI Hyperattacks.”
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