Horizon3.ai
Category: AI in Cybersecurity
Horizon3.ai provides an autonomous penetration testing platform, NodeZero, that continuously assesses and helps remediate exploitable attack vectors before they can be used in an attack. Horizon3.ai was founded in 2019. The company is led by Snehal Antani. Based in San Francisco, CA, USA. Team size: 102. Total funding raised: Approximately $40 million. Latest round: Series D ($100M, Jun 2025) - Automated security testing platform. Key investors include NEA, Craft Ventures, SignalFire.
- Founded
- 2019
- Headquarters
- San Francisco, CA, USA
- Team size
- 102
- Total funding
- Approximately $40 million
Value proposition
Enables organizations to proactively identify, remediate, and verify exploitable attack paths through an autonomous, self-service SaaS platform, thereby reducing security risk and optimizing remediation efforts.
Products and solutions
NodeZero (Autonomous Penetration Testing Platform), NodeZero Federal
Unique value
Utilizes autonomous, AI-driven penetration testing that simulates attacker behavior to identify exploitable attack paths continuously, rather than relying solely on periodic manual testing.
Target customer
Enterprises, public sector agencies, and organizations seeking continuous security assessment and improvement across various attack surfaces (external, identity, on-premises, IoT, cloud).
Industries served
Government/Public Sector, Finance, Healthcare, Manufacturing, Technology, Education, Energy, Legal, Retail
Technology advantage
The NodeZero platform autonomously directs tests across multiple domains (cloud, on-prem, IoT/OT, external), prioritizes findings by impact, provides actionable remediation steps, and verifies fixes—all safe to run in production environments.
How they differentiate
Focuses on autonomous, AI-driven continuous penetration testing that highlights exploitable attack paths and their impacts, distinguishing it from traditional vulnerability scanning tools. It offers a self-service SaaS model with ease of deployment and use.
Main competitors
CyCognito, Veza, Other penetration testing and vulnerability management solution providers
Key partnerships
AWS Marketplace, Carahsoft, Vanguard Partner Program (Global Channel Initiative)
Notable customers
U.S. federal agencies (FedRAMP High authorized), Enterprise clients across various industries
Major milestones
Achieved FedRAMP High Authorization Completed a successful Series C funding round Recognized as a leader in autonomous penetration testing Expanded partner network and engineering team
Growth metrics
Experiencing strong revenue growth and rapid market adoption, with significant increases in annual recurring revenue and pipeline development.
Market positioning
Positioned as a leader in autonomous penetration testing and exposure management, delivering proactive offensive security solutions for enterprises and government agencies.
Geographic focus
Primarily North America with expanding global channel initiatives.
Patents and IP
None publicly disclosed.
About Snehal Antani
Snehal Antani is a seasoned leader with a diverse background spanning entrepreneurship, public sector, and enterprise technology. Prior to co-founding Horizon3.ai, he served as the first Chief Technology Officer for the Joint Special Operations Command (JSOC). He also held leadership positions as CTO at Splunk and CIO at GE Capital.
Official website: https://horizon3.ai/