Aug 3, 2026
Cybersecurity firm Horizon3 raises $250M at $2B valuation, tripling value in 14 months
San Francisco-based cybersecurity startup Horizon3 announced a $250 million Series E funding round that values the company at over $2 billion, more than tripling its $650 million valuation from June 2025. The company specializes in autonomous penetration testing and AI-driven security solutions.
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