The funding round was co-led by Andreessen Horowitz and Accel, with participation from new investors Bain Capital Ventures and Redpoint. Existing backers, including Google Ventures, Kleiner Perkins, Menlo Ventures and In-Q-Tel, also took part.
Armadin said the latest investment brings its total funding to $445 million, underscoring the growing investor interest in cybersecurity companies developing artificial intelligence tools to counter emerging threats.
The company plans to use the new capital to expand its cybersecurity platform and increase spending on research, training and go-to-market operations.
Armadin's technology uses a network, or “swarm,” of AI agents designed to behave like hackers. The agents search for vulnerabilities in systems and help identify weaknesses that could potentially be exploited by real-world attackers.
The approach reflects a broader shift in cybersecurity toward using artificial intelligence not only to detect attacks after they occur, but also to simulate potential threats and identify vulnerabilities before malicious actors can exploit them.
The company was founded by Kevin Mandia, a veteran cybersecurity executive who previously founded cybersecurity firm Mandiant. Mandia later sold Mandiant to Google in a deal that strengthened the technology giant's cybersecurity business.
Armadin's latest financing comes as investors increasingly focus on startups seeking to address the security risks accompanying rapid advances in artificial intelligence. As companies deploy AI systems more widely, cybersecurity firms are developing new tools to protect those systems while also using AI to automate parts of the process of finding and addressing security flaws.
With the fresh funding, Armadin aims to scale both its technology and commercial operations as demand grows for cybersecurity tools capable of keeping pace with AI-enabled threats.