Armadin Raises $255.5M Series B at $2.5B Valuation

Armadin, based in Palo Alto, California, is an AI-native cybersecurity company that provides an autonomous security platform. The company has raised $255.5 million in a Series B funding round, bringing its total funding to $445 million.

Investors

This round was co-led by Andreessen Horowitz (a16z) and Accel. Additional participating investors included Bain Capital Ventures (BCV), Redpoint, 8VC, Ballistic Ventures, Google Ventures, In-Q-Tel, Kleiner Perkins, and Menlo Ventures.

Armadin Use of Funds

Armadin plans to use the new capital to scale its agentic security platform, as well as to expand its research, training, and go-to-market efforts.

About Armadin

Founded in 2026, Armadin is led by CEO Kevin Mandia. The company is composed of engineers, researchers, and hackers with the mission to create effective autonomous security. Their platform utilizes AI-powered offensive security to identify and eliminate exploitable risks by simulating attack paths and validated kill chains for enterprise and government customers.

Funding Details

Company Website: https://armadin.com

Company: Armadin
Raised: $255.5M
Round: Series B
Funding Date: October 1, 2026
Lead Investor: Andreessen Horowitz (a16z) and Accel
Additional Investors: Bain Capital Ventures (BCV), Redpoint, 8VC, Ballistic Ventures, Google Ventures, In-Q-Tel, Kleiner Perkins, Menlo Ventures
Company Website: www.armadin.com
Software Category: Cybersecurity
Source: https://www.prnewswire.com/news-releases/armadin-raises-255-5-million-series-b-to-scale-effective-autonomous-security-302895278.html