Armadin emerged from stealth with $189.9 million in combined Seed and Series A funding—the largest early-stage cybersecurity round in history. Led by cybersecurity veteran Kevin Mandia, the company is building what it calls “agentic attacker swarms” to counter AI-powered “hyperattacks” that move faster than human defenders can respond.

The timing reflects a fundamental shift in enterprise security thinking. As AI-powered threats evolve to operate at machine speed, traditional human-led cybersecurity approaches are creating a dangerous response gap. Armadin’s infrastructure addresses this by deploying autonomous AI agents that think, plan, and adapt like nation-state attackers—24/7, across every network endpoint.

7AI raised $130 million in the largest cybersecurity Series A funding round in history, validating autonomous AI agents as the infrastructure solution to enterprise security operations that can’t scale with traditional approaches.

The Boston-based company, led by Cybereason co-founder Lior Div, has processed over 2.5 million security alerts and completed more than 650,000 autonomous investigations in just 10 months since emerging from stealth. The Index Ventures-led round, with participation from Blackstone Innovations Investments, signals enterprise confidence in agentic security infrastructure that replaces human-driven alert triage with AI agents that investigate threats autonomously.