Horizon3.ai
Track on RadarAutonomous pentesting platform for continuous vulnerability validation
- Total raised
- $178.5M
- Employees
- 446
- Founded
- 2019
- Momentum
- 71
Accelerating
Data updated August 2026
About
About Horizon3.ai
At a glance
Horizon3.ai is a cybersecurity company specializing in Security Operations, founded in 2019 and headquartered in San Francisco, United States. It has raised $178.5M in total funding, employs about 446 people, and is privately held.
Horizon3.ai provides offensive security solutions through its NodeZero platform, an autonomous pentesting system that identifies exploitable vulnerabilities in production environments. The platform operates by simulating attacker behavior to discover security weaknesses, prioritize remediation based on actual exploitability, and verify that fixes have been properly implemented. NodeZero conducts autonomous penetration tests at scale, enabling organizations to continuously assess their security posture without requiring manual intervention. The company serves over 4,500 global organizations across multiple sectors including manufacturing, healthcare, finance, critical infrastructure, and national security. Notable customers include over 40% of the Fortune 10, major global banks, pharmaceutical and semiconductor manufacturers, and the U.S. Defense Industrial Base. The platform has executed more than 180,000 autonomous pentests. Horizon3.ai was founded by U.S. Special Operations veterans and industry experts and is headquartered in San Francisco. The company delivers its solutions through direct sales and an expanding partner ecosystem that includes managed service providers (MSPs) and managed security service providers (MSSPs). The platform integrates with existing security tools through technology alliances and can be operationalized by partners to deliver security outcomes for their customers.
Momentum
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Valuation
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Funding
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Privately held
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FAQ
Frequently asked questions about Horizon3.ai
When was Horizon3.ai founded?▾
Horizon3.ai was founded in 2019.
Where is Horizon3.ai headquartered?▾
Horizon3.ai is headquartered in San Francisco, United States.
How much funding has Horizon3.ai raised?▾
Horizon3.ai has raised a total of $178.5M in total funding.
Is Horizon3.ai public or private?▾
Horizon3.ai is a privately-held company.
How many employees does Horizon3.ai have?▾
Horizon3.ai has approximately 446 employees.
