AI‑Driven Security Pioneer Horizon3 Hits $2 Billion Valuation with $250 M Series E

San Francisco‑based cybersecurity startup Horizon 3 raised $250 million in a Series E, catapulting its valuation to $2 billion in just 14 months.

Investors Re‑align Focus

■NightDragon and NEA returned, reinforcing confidence.

■Strategic partners Singapore’s EDBI, SAIC, and Qualcomm broaden the network.

Continuous Penetration Testing: The New Standard

■NodeZero delivers live system testing without downtime.

■Replacing annual, 2‑3 % snapshots with monthly or weekly, full‑infrastructure scans.

Growth Trajectory and Revenue Momentum

■$100 million ARR with 120 % YoY growth.

■310 000 production security tests executed with zero disruptions.

Geographic Expansion and Operational Strategy

■New offices in Amsterdam, Australia, and Singapore.

■Expanding partner ecosystem while maintaining robust R&D spend.

Market Share and Competitive Dynamics

■7 200‑7 300 customers, from small MSPs to Fortune 10 firms.

■Market valued at $271.9 billion (2025) and projected to hit $663.2 billion (2033).

Strategic Insight: AI‑Enabled Security

■AI‑driven attack velocity fuels demand for scalable security testing.

■Horizon 3’s automated, controllable systems aim to mitigate AI risk.

Dr. Yaman Ege: Horizon 3’s story marks a turning point in AI‑powered cybersecurity. By moving from traditional annual scans to continuous, exhaustive testing, the company equips critical sectors with near‑real‑time threat visibility. Investors’ strategic backing and high growth rates cement its competitive edge, while the evolving AI attack landscape sets a new benchmark for security ecosystems.