AI cybersecurity firm Armadin raises $189.9m funding

Armadin

Armadin has announced the completion of a $189.9m Seed and Series A funding round as it looks to prepare enterprises for a new generation of AI-powered cyberattacks.

The round was led by Accel, with participation from Google Ventures, Kleiner Perkins, Menlo Ventures and In-Q-Tel. Existing backers 8VC and Ballistic Ventures also joined the round with follow-on investment. According to the company, the deal represents the largest combined Seed and Series A funding round ever completed by a cybersecurity company.

The company is positioning itself around a new category of cyber threats driven by artificial intelligence. As attackers increasingly deploy machine-speed automation and sophisticated AI models, Armadin believes traditional human-led defensive strategies can no longer keep pace.

The firm is developing a unified platform designed to identify exploitable risks, validate potential attack paths and enable organisations to address vulnerabilities before they are exploited.

At the core of its technology is a system that models how real attackers behave. Rather than simply scanning for vulnerabilities, Armadin deploys specialised AI agents that operate in what the company describes as an “agentic attacker swarm”.

These agents use custom-built models that reason, plan and adapt in ways similar to advanced human threat actors. The goal is to simulate realistic attacks across corporate environments, giving executives and security teams clear proof of what systems could actually be compromised.

The newly secured funding will be used to expand the company’s technology platform, scale its AI engineering capabilities and accelerate the deployment of its offensive security models. Armadin also intends to deepen its work with enterprise customers and government organisations as the cybersecurity industry adapts to increasingly automated and complex attack techniques.

The company argues that the rise of AI-driven attackers has ushered in what it calls the era of “Hyperattacks”, campaigns that combine multiple attack methods and unfold at speeds far beyond the response capabilities of traditional security teams.

By automating offensive testing and continuously probing infrastructure for exploitable weaknesses, Armadin aims to provide organisations with a more realistic and continuous assessment of their cyber resilience.

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, “Armadin is the first company we’ve seen that truly weaponizes the attacker’s perspective to build a more resilient defense.”

Armadin founder and chief offensive security officer Evan Peña said, “At Armadin, we are taking decades of human-led red teaming expertise and reinforcing it into AI models.”

Armadin founder and chief technology officer Travis Lanham said, “Before Armadin, you could not put a nation-state level adversary inside every network 24/7.”

The company’s leadership team combines offensive security specialists, AI researchers and engineering talent. It is led by Kevin Mandia, who has longstanding relationships across Fortune 100 companies, federal law enforcement agencies and defence departments.

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