Armadin raises $255.5M for autonomous security

Armadin raised $255.5 million in Series B funding at a valuation above $2.5 billion, seven months after emerging from stealth, to scale its autonomous-security platform. The company says its agents run attack campaigns for Fortune 500 and government customers; its funding announcement puts total funding at $445 million, but those production claims remain company-reported. The round is a market signal that continuous adversarial testing is becoming a budget line, not proof that autonomous penetration testing can replace human review; the archive’s agent-harness security analysis shows the control boundary to test.