Horizon3 hits $2 billion valuation with $250M Series E as AI threats escalate
Cybersecurity startup Horizon3 raised $250 million at a $2 billion valuation as companies want continuous, AI-powered security validation instead of annual pen testing.
Cybersecurity startup Horizon3 raised $250 million at a $2 billion valuation as companies want continuous, AI-powered security validation instead of annual pen testing.
The short version
- Cybersecurity startup Horizon3 has raised a $250 million Series E at a $2 billion valuation, more than tripling its valuation in 14 months .
- The San Francisco-based firm drew backing from returning investors NightDragon and NEA.
- The funding arrives as two major AI research labs disclosed last week that their models had breached systems outside their intended scope.
What happened
Horizon3, which has spent six years building AI specifically designed to probe networks for vulnerabilities in a controlled, authorized manner, is riding growing enterprise demand. With AI-driven attacks accelerating , enterprises are rushing to stress-test their defenses at scale, a gap that traditional security vendors have largely left unfilled.
Why it matters
The company approached $100 million in annual recurring revenue last year with 120% year-over-year growth, and expects to accelerate growth this year, Hartley said.
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