Horizon3.ai, a California-based cybersecurity startup, raised $250 million in a Series E funding round, valuing the company at approximately $2 billion. This valuation more than tripled in under a year, jumping from above $750 million in mid-2025. The company’s NodeZero platform performs continuous autonomous penetration tests, having executed between 150,000 and 170,000 tests and serving over 3,000 organizations. Annual recurring revenue surged 137% year-over-year in the first half of 2025, reflecting growing demand for automated security strategies. The company also launched NodeZero WebApp Pentesting, extending its capabilities to web applications, an approach with direct implications for crypto firms seeking to secure their infrastructure.
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