Horizon3 Triples Valuation to $2B+ in Series E as AI Cyberattacks Escalate
Event summary
- Horizon3 raised $250M in Series E, tripling its valuation to over $2B from $650M in Series D.
- The round was co-led by NightDragon and NEA, with participation from seven new investors.
- NodeZero platform has executed 310,000 tests safely in production, driving 120% YoY ARR growth.
- Horizon3 protects over 7,000 organizations globally, including Fortune 10 enterprises and government agencies.
- Proceeds will fuel aggressive GTM scaling, international expansion, and next-gen product innovation.
The big picture
Horizon3's massive funding round underscores the accelerating global demand for autonomous security validation as AI-driven cyberattacks escalate. The company's unique approach, combining a data moat built on extensive testing with regulatory compliance capabilities, positions it as a key player in reshaping how enterprises defend their data. With a valuation tripling in just over a year, Horizon3 is poised to scale aggressively and lead the AI vs. AI cybersecurity era.
What we're watching
- Market Leadership
- Whether Horizon3 can sustain its rapid growth and maintain its lead in the AI vs. AI cybersecurity era.
- International Expansion
- The pace at which Horizon3 can successfully enter new markets like Singapore and Australia while deepening presence in EMEA.
- Product Innovation
- How the continuous learning loop between AI attackers and defenders will evolve and impact security outcomes.
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