Autonomous Security

Horizon3 Raises $250M at $2B Valuation for AI Cybersecurity

Security teams can find thousands of vulnerabilities across an enterprise network. The harder problem is knowing which ones attackers can actually exploit—and whether the fix worked. Horizon3 has raised an oversubscribed $250 million Series E at a valuation above $2 billion, more than tripling its $650 million Series D valuation in just over a year. […]