Security Startups

Horizon3.ai

NodeZero autonomous pentest that exploits live networks the way an attacker would, continuously.

Proof of life. Raised $250M Series E at a $2B-plus valuation, August 2026

About Horizon3.ai

Horizon3's NodeZero runs production-safe autonomous pentests across internal and external networks instead of scheduling a consultancy week.

Findings are chained exploit paths, not a CVE dump, so the ticket is 'this is how we get to domain admin' rather than 'patch someday'.

The same engine is now sold as AI-versus-AI security as attackers start automating the same recon.

Investors

NEANightDragonCraft VenturesSignalFire
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