Horizon3.ai

ai offers the NodeZero platform, which performs autonomous penetration testing and vulnerability management.

Latest funding

$250M Series B+ · August 3, 2026

Led by NEA · Source: siliconangle.com

Total raised: $428.5M across 5 sourced rounds

All 5 rounds ↓

Website: horizon3.ai.

X: @Horizon3ai · 3,036 followers.

GitHub: horizon3ai.

LinkedIn: horizon3ai.

Categories: Fintech Health and bio Cybersecurity.

Sectors: Artificial Intelligence (AI), Cyber Security, Enterprise Software, Machine Learning, Network Security.

Stage: Series B+.

Based in: San Francisco, United States.

Founded: 2019.

Total raised: $428.5M in 5 sourced rounds.

Last round: Aug 3, 2026 · 104 days ago.

Headcount: 501–1000 employees.

On Recent Funding since: Sep 29, 2026.

Signals

X account@Horizon3ai · created Aug 26, 2020 (6 years old) · 3,036 followers

Website registeredDec 15, 2017 (8 years old)

About Horizon3.ai

It helps organizations assess their attack surfaces by simulating real-world attack scenarios. Its customers include ITOps and SecOps teams, security teams, pentesters, and organizations in federal, financial services, and healthcare sectors.

TIMELINE · MONEY RAISED

Horizon3.ai | 286 days from X account to first raise on record

@Horizon3ai·Raised $429M in 5 sourced rounds·1 signal before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

Date	Round	Amount	Lead	Source
Aug 3, 2026	Series B+	$250M	NNEA	siliconangle.com
Jun 10, 2025	Series B+	$100M	NNEA	horizon3.ai
Aug 8, 2023	Series B+	$40M	CCraft Ventures	horizon3.ai
Nov 2, 2021	Series B+	$30M	SSignalFire	horizon3.ai
Jun 8, 2021	Series A	$8.5M	SSignalFire	siliconangle.com

Timeline

August 26, 2020
X account created
December 15, 2017
Website created

Founders and team

SA
Snehal Antani Co-Founder, CEO

@snehalantani · LinkedIn · source: horizon3.ai
AP
Anthony Pillitiere Co-Founder

LinkedIn · source: horizon3.ai
AB
Andres Botero Chief Marketing Officer
HG
Holly Grey Chief Financial Officer
JP
Jill Passalacqua Chief Legal Officer
MH
Matthew Hartley Chief Revenue Officer
RC
Robert Cariddi Chief Revenue Officer (CRO)
TR
Torie Runzel Vice President of People

Investors

Companies like Horizon3.ai

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XXBOW$35M Series B+ · May 2026
CCyera$400M Series B+ · Sep 2026
CCyCognito$100M Series B+ · Dec 2021
FFrenos$1.52M Seed · Jul 2026
CChainguard$356M Series B+ · Apr 2025

Other companies backed by NEA

DDatabento$100M Series B+ · Nov 2026
BBasalt Health$20M Series A · Oct 2026
PPathos$237M Series B+ · Oct 2026
TTamr$21M Series B+ · Oct 2026
SSpiko Paris, France$90M Series B+ · Oct 2026
AAutomating software development$200M Series B+ · Sep 2026

NEA portfolio →

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/horizon3-ai (get a free API key).