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Startups & Venture·August 3, 2026·1 min read

Horizon3 hits $2 billion valuation with $250M Series E as AI threats escalate

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Continuous, AI-powered security validation is eating the once-a-year pentest budget—$250M at a $2B valuation is the market voting for that shift. CISOs should assume boards will start asking why they don't have always-on attack simulation in place.