Armadin

Armadin announced $255.5M in Series B financing on October 1, 2026. Armadin raised a $255.5 million Series B co-led by Andreessen Horowitz and Accel to scale its agentic security platform and its research, training, and go-to-market efforts.

Round details

The financing includes backing from Andreessen Horowitz, Accel, Bain Capital Ventures, Redpoint, 8VC, Ballistic Ventures, Google Ventures, In-Q-Tel. The company reported a $2.5B+ valuation alongside the transaction.

• Round: Series B
• Capital announced: $255.5M
• Total funding reported: $445M

How the company plans to use the capital

Armadin will use the investment to scale its agentic security platform and to expand its research, training, and go-to-market efforts.

Why this matters for GTM teams

The round shows investors continuing to back AI-native cybersecurity, with the company arguing that frontier AI models compress the time between vulnerability disclosure and working exploit, so periodic penetration tests cannot keep pace.

Fresh capital is often an operational signal rather than a buying signal by itself. Teams should validate the company’s hiring pattern, product launches, geographic expansion, and technology priorities before choosing the message and timing of outreach.

Source and methodology

This report is based on the company’s announcement and records the disclosed amount, round, investors, location, and stated use of funds. SalesTools Research does not estimate undisclosed valuation or revenue figures.

Primary source: Armadin Series B announcement.