Horizon3.ai
Only Pentesting Platform Proven in Production
San Francisco, United States · Founded 2019 · $540.0M raised
- Headquarters
- San Francisco, California
- Employees
- 201–500
- Founded
- 2019
- Business Model
- B2B
- Website
- horizon3.ai
- Total Funding
- $540.0M
- Last Round
- $250.0M Series EJul 2026
- Rounds
- 9
About
Horizon3.ai is a team of US Special Operations, national security, and cybersecurity veterans on a mission to turn the map around — using the attacker's perspective to help enterprises continuously find, fix, and verify exploitable weaknesses. Their NodeZero platform autonomously executes penetration tests using AI-driven knowledge graphs, delivering the skills of a 20-year pentesting veteran at a fraction of the cost.
Summary
Horizon3.ai is a Cybersecurity company based in San Francisco, United States, founded in 2019. It has raised $540.0M in total across 9 rounds, most recently a $250.0M Series E round in Jul 2026. Investors include SignalFire, Craft Ventures and New Enterprise Associates.
Tech & App Stack
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Funding History
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Jul 2026
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Series B through Series E — per-round amounts, valuations, and who invested in each round.
Investors
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