● Covered by 2 sources · 2 reportsMedium impact2 neutral
Horizon3 Raises $250M Series E, Reaching $2 Billion Valuation
Key points
- Horizon3 raised $250 million in Series E funding.
- The company's valuation is now $2 billion, up from $650 million.
- NightDragon and NEA co-led the funding round.
- The funding supports growth amid rising AI-driven cyber threats.
- Horizon3's NodeZero platform tests live systems continuously.
Funding Round Details
Horizon3, a San Francisco-based cybersecurity startup, has completed a Series E funding round, raising $250 million. This investment has propelled the company's valuation to $2 billion, a significant increase from its previous valuation of $650 million just 14 months prior. The round was co-led by existing investors NightDragon and NEA, with additional participation from seven new investors and five returning backers.
Addressing AI-Driven Threats
The funding arrives as enterprises face an increase in AI-driven cyberattacks. Horizon3 specializes in using AI to probe networks for vulnerabilities in a controlled and authorized manner. The company's chief revenue officer, Matt Hartley, noted that AI will enable attacks at a speed and scale that human-centric defenses may not adequately address, suggesting an evolution towards machine-versus-machine cybersecurity.
NodeZero Platform Capabilities
Horizon3's core product, the NodeZero platform, offers two main capabilities. It can test live systems without requiring operations to shut down, a feature that other AI-powered tools have reportedly struggled to deliver reliably. Additionally, NodeZero continuously scans an entire infrastructure, examining the full network rather than conducting annual or partial assessments.
Company Growth and Market Position
Founded in 2019, Horizon3 approached $100 million in annual recurring revenue last year, demonstrating 120% year-over-year growth. The company's growth is attributed to the increasing enterprise demand for continuous, automated vulnerability testing, a gap that traditional security vendors have largely left unfilled as AI-driven attacks accelerate.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
The daily brief
One email each morning: the day's tech stories, clustered across outlets and summarized. No account needed.
One email a day. Unsubscribe in one click, any time.
Today's brief
Spend a few minutes, get the whole day. Every topic's top stories in one hands-free rundown — listen, watch, or read the transcript.
▶ Play today's brief
New every morning, and the back catalogue is archived by date.
How outlets covered it
Horizon3, a cybersecurity firm, secured $250 million in Series E funding, increasing its valuation from $650 million to $2 billion. This funding round, co-led by NightDragon and NEA, will support the company's continued growth in the AI-driven cybersecurity market.
Cybersecurity startup Horizon3 secured $250 million in Series E funding, valuing the company at $2 billion, a significant increase from its previous valuation. This funding round comes as enterprises face escalating AI-driven threats and seek solutions for continuous, automated vulnerability testing.