Horizon3.ai
Summary active Updated Aug 3, 2026This profile is AI-generated. If you spot an error, please help us fix it by sharing a URL to the correct information.
Investors
Founders
About
Horizon3.ai is a San Francisco-based cybersecurity company that builds autonomous, AI-powered penetration testing software for enterprises and government agencies 12. The company’s flagship platform, NodeZero, allows organizations to continuously pentest their production infrastructure without shutting down operations, replacing periodic manual assessments with continuous, autonomous testing 12. Horizon3 was co-founded in 2019 by CEO Snehal Antani (former CTO of US Special Operations Command) and CTO Anthony Pillitiere 1. The company reports 120% year-over-year ARR growth, more than 7,000 organizations served, and 310,000+ tests safely executed in production 1.
Funding History
| Date | Round | Amount | Lead | Co-investors |
|---|---|---|---|---|
| 2026-08-03 | Series E | $250M | NightDragon, NEA | Acrew Capital, Blue Cloud Ventures, Demeter Group, EDBI, PSG, SAIC, Sapphire Ventures, Craft Ventures, Prosperity7 Ventures, Qualcomm Ventures, Ridge Ventures, SignalFire 12 |
| 2025-06-10 | Series D | $100M | NEA | NightDragon, Qualcomm Ventures, SignalFire, Craft Ventures, 9Yards Capital 3 |
The Series E was co-led by NightDragon and NEA and valued Horizon3 at more than $2 billion 12. Dave DeWalt (Founder/CEO of NightDragon, former CEO of FireEye and McAfee) and Morgan Kyauk (Managing Director at NightDragon) joined Horizon3’s board of directors as part of the round 1. Proceeds will fund aggressive go-to-market scaling, international expansion into Singapore and Australia, and continued product innovation on autonomous blue-team remediation agents 12.
What Investors Say
No independently sourced investor commentary beyond press-release attribution at this time.
What Founders Say
Snehal Antani, Co-Founder and CEO, said in the Series E announcement: “We invented the concept of AI Hackers and spent six years earning the right to autonomously pentest the most critical and sensitive networks in the world — with no humans in the loop.” 1
Sources
-
“Horizon3 Raises $250M Series E at $2B+ Valuation to Lead the ‘AI vs. AI’ Cybersecurity Era,” Horizon3.ai press release, August 3, 2026. Accessed August 2026. https://horizon3.ai/news/press-release/horizon3-raises-250m-series-e-at-2b-valuation-to-lead-the-ai-vs-ai-cybersecurity-era/↩↩↩↩↩↩↩↩↩
-
“Horizon3 hits $2 billion valuation with $250M Series E as AI threats escalate,” TechCrunch, August 3, 2026. Accessed August 2026. https://techcrunch.com/2026/08/03/horizon3-hits-2-billion-valuation-with-250m-series-e-as-ai-threats-escalate/↩↩↩↩↩
-
“Horizon3.ai Raises $100M to Cement Leadership in Autonomous Security,” BusinessWire, June 10, 2025. Accessed August 2026. https://www.businesswire.com/news/home/20250610254822/en/Horizon3.ai-Raises-$100M-to-Cement-Leadership-in-Autonomous-Security↩