Startup · United States

Armadin

HQ Palo Alto, United StatesFounded 2025

Armadin is an AI-powered red teaming platform that continuously finds and eliminates exploitable risk across an organization's attack surface, matching the speed of modern AI-driven threats before adversaries can strike.

Series B · Oct 1, 2026

Funding3 rounds · $445M

Disclosed: $445M
Latest: $256MSeries B · Oct 1, 2026

Cumulative raised$445M

Oct 10, 2025Oct 1, 2026

Funding rounds
Announced	Stage	Amount	Valuation	Lead investors	Other investors	Confidence
Oct 1, 2026	Series B	$256M	$2.50B?	Accel, Andreessen Horowitz	8VC, Bain Capital Ventures, Ballistic Ventures, GV, In-Q-Tel, Kleiner Perkins, Menlo Ventures, Redpoint	Confirmed
Dec 29, 2025	Series A	$165M	—	Accel	8VC, Ballistic Ventures, GV, In-Q-Tel, Kleiner Perkins, Menlo Ventures	Confirmed
Oct 10, 2025	Seed	$24.0M	—	—	—	Confirmed

Series B
Led by Accel, Andreessen Horowitz
With 8VC, Bain Capital Ventures, Ballistic Ventures, GV, In-Q-Tel, Kleiner Perkins, Menlo Ventures, Redpoint
Valuation $2.50B?
Confirmed
$256M
Oct 1, 2026
Series A
Led by Accel
With 8VC, Ballistic Ventures, GV, In-Q-Tel, Kleiner Perkins, Menlo Ventures
Confirmed
$165M
Dec 29, 2025
Seed
Confirmed
$24.0M
Oct 10, 2025

Totals add known amounts using recorded USD conversions where available; other currencies are shown separately. A ~ marks an estimated amount.

People4

Chief Offensive Security Officer

Sources5

Funding4

1
CompanyArmadin Raises $255.5 Million Series B to Scale Effective Autonomous Security
PR Newswire · Oct 1, 2026 · Supports Funding round · amount, Funding round · post money valuation usd
“today announced it has raised $255.5 million in Series B funding co-led by Andreessen Horowitz (a16z) and Accel”
2
CompanyArmadin Secures Record-Breaking $189.9M in Seed and Series A Funding
Armadin · Mar 10, 2026 · Supports Funding round
“today announced it has raised an industry record $189.9 million in Seed and Series A funding”
3
Regulatory filingArmadin, Inc. - SEC Form D (0002094470-26-000001)
U.S. Securities and Exchange Commission · Jan 14, 2026 · Supports Funding round · amount
“Total Amount Sold $165,199,989 USD”
4
Regulatory filingArmadin, Inc. - SEC Form D (0002094470-25-000001)
U.S. Securities and Exchange Commission · Nov 3, 2025 · Supports Funding round · amount
“Total Amount Sold $23,999,997 USD”

People1

5
OtherBlack Flag 100.2
Black Flag · Supports Organization, Role
“Armadin is an AI-powered red teaming platform that continuously finds and eliminates exploitable risk across an organization's attack surface, matching the”

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