Armadin, a San Francisco, CA–based AI-native cybersecurity company focused on autonomous threat simulation and defense, has raised $189.9 million in Seed and Series A funding.
Investors
The round was led by Accel, with participation from Google Ventures, Kleiner Perkins, Menlo Ventures, and In-Q-Tel, along with follow-on investments from 8VC and Ballistic Ventures.
Founded in 1983 and headquartered in Palo Alto, Accel is a global venture capital firm that partners with exceptional founders from inception through all phases of growth. The firm has backed category-defining technology companies across consumer, enterprise, and infrastructure sectors, with a long-term, founder-centric approach. Accel operates with a global footprint, investing across North America, Europe, Israel, India, and Southeast Asia.
Armadin Use of Funds
The company will use the funding to support the development and scaling of its AI-powered cybersecurity platform designed to defend against machine-speed, AI-driven attacks.
About Armadin
Led by CEO Kevin Mandia, Armadin is a cybersecurity company building an AI-native platform designed to defend organizations against next-generation AI-powered cyber threats. The company focuses on developing autonomous offensive security systems that simulate advanced threat actors to identify exploitable vulnerabilities before attackers do. Armadin’s platform uses an “agentic attacker swarm,” a network of specialized AI agents that continuously analyze, plan, and execute simulated attacks to test enterprise security defenses at machine speed. Headquartered in San Francisco, California, Armadin’s mission is to prepare organizations for the speed and scale of AI-driven threats.
Funding Details
Company: Armadin, Inc.
Raised: $189.9M
Round: Seed and Series A
Funding Date: March 2026
Lead Investor: Accel
Additional Investors: Google Ventures, Kleiner Perkins, Menlo Ventures, In-Q-Tel, 8VC, Ballistic Ventures
Company Website: https://www.armadin.com/
Software Category: Cybersecurity / AI Security Platform
Source: https://www.prnewswire.com/news-releases/armadin-secures-record-breaking-189-9m-in-seed-and-series-a-funding-to-combat-the-era-of-ai-driven-hyperattacks-302709318.html