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: 101-500. Total funding raised: $428.5 million. Latest round: Series E. Key investors include NightDragon, NEA, Craft Ventures, SignalFire, 9Yards Capital, Prosperity7 Ventures, Qualcomm Ventures, Acrew Capital, Sapphire Ventures, EDBI, PSG, SAIC.
- Founded
- 2019
- Headquarters
- San Francisco, CA, USA
- Team size
- 101-500
- Total funding
- $428.5 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, NodeZero WebApp Pentesting
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
Pentera, Picus Security, AttackIQ / Cymulate
Key partnerships
AWS Marketplace, Carahsoft, Vanguard Partner Program (Global Channel Initiative)
Notable customers
7,000+ organizations including U.S. federal agencies (FedRAMP High), NSA, 4 of the Fortune 10, multinational banks, major healthcare networks, and enterprises across regulated industries
Major milestones
FedRAMP High Authorization, Series D $100M (Jun 2025, $650M valuation), Series E $250M at $2B+ valuation (Aug 2026), Named Fastest Growing Cybersecurity Company in North America (Deloitte Technology Fast 500), Named one of Fast Company's Most Innovative Companies 2026, Opened Amsterdam EMEA HQ, expanding Australia and Singapore, Launched NodeZero WebApp Pentesting (2026)
Growth metrics
120% year-over-year ARR growth; approached ~$100M ARR (2025); 7,000+ customers; 310,000+ production pentests with zero disruptions; Deloitte Technology Fast 500 fastest-growing cybersecurity company in North America.
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
North America core with active international expansion: Amsterdam EMEA HQ (2026), Australia, Singapore/APAC; global channel and partner network.
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.
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Official website: https://horizon3.ai/
