Horizon3 Raises $250M Series E at $2B Valuation

Cybersecurity startup Horizon3 raised $250 million at a $2 billion valuation, tripling from $750 million in 14 months. Returning investors NightDragon and NEA backed the round. The company nears $100 million in annual recurring revenue, growing 120% year over year. Its product, NodeZero, autonomously runs penetration tests — simulated attacks on a company's own systems — completing 310,000 with zero disruptions.