Xcout IntelHorizon3 AI
Horizon3.ai is a cybersecurity company that develops NodeZero, an autonomous penetration-testing platform designed to identify and validate exploitable vulnerabilities and attack paths. It serves enterprise security teams and organizations seeking continuous, automated testing of their networks, cloud environments, and applications.
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Horizon3 AI at a glance
Horizon3 AI is a cybersecurity company headquartered in United States. Its most recent funding round, Series E, raised $250M in August 2026. Xcout tracks 15 named people at Horizon3 AI, including Holly Grey (Chief Financial Officer). Xcout recorded 304 job postings from Horizon3 AI in the last 90 days, naming tools such as Salesforce, Datadog, Jira.
Horizon3 AI leadership
- Holly GreyChief Financial Officer
- Matthew HartleyChief Revenue Officer
- Andres BoteroChief Marketing Officer
- Jill PassalacquaChief Legal Officer
- Antani SnehalCo-Founder, CEO
- Drew MullenVice President of Revenue Operations
9 more named people on record for Horizon3 AI, with roles, board committees and tenure — see the full roster →
Horizon3 AI funding rounds
Every round on record:
| Date | Round | Amount | Investors |
|---|---|---|---|
| Series E | $250M | 5 named |
Who invested in each round, lead investors, valuations and the co-investor graph — open the full funding history →
Hiring at Horizon3 AI
Xcout recorded 304 job postings from Horizon3 AI in the last 90 days, from a hiring record Xcout has kept since May 2026.
Tools named in Horizon3 AI's job postings
The weekly hiring trend, the roles and locations behind it and all 33 tools — see Horizon3 AI's hiring signals →
Recent Horizon3 AI news
Hiring vs the trend
Based on 122 job postings in the last 8 weeks (10 Aug – 4 Oct 2026), compared with 197 startup technology companies.
This describes a hiring pattern — how often Horizon3 AI’s job postings ask for AI skills, and how that changed against the previous 8 weeks, ranked among its peers. It says nothing about the company’s products or performance.
Signed-in members see the AI-skill share and its change with peer percentiles, role mix, posting momentum and advertised US pay against the market.
Investors
Tech stack
Horizon3 AI competitors
A few of Horizon3 AI's closest competitors — see the full list of competitors and alternatives →
Hex Security provides an AI-powered autonomous penetration testing platform designed for web applications, APIs, and infrastructure. The company uses autonomous agents to continuously discover critical vulnerabilities and provide validated proofs-of-concept for engineering and security teams.
Autonomous Cyber provides an AI platform designed for commercial and government cybersecurity professionals to conduct offensive hacking and security testing. The platform, FUZZ-E, helps users find deep bugs, compromise networks, build bespoke tooling, and adapt to AI-enabled defenses.
runZero is an exposure management platform founded by HD Moore that helps organizations find unknown assets, assess risk, and reduce cyber exposure.
Hadrian provides an autonomous, AI-driven offensive cybersecurity platform that offers continuous attack surface management, agentic penetration testing, and adversarial exposure validation. The company's software helps enterprise security teams discover internet-facing assets, emulate real-world attacks, and prioritize risks to streamline remediation. Their solutions serve security operations center (SOC) teams and Chief Information Security Officers across various industries.
Method Security, Inc. develops AI-powered security platforms and full-spectrum security products designed to provide cyber resilience for the U.S. government and critical enterprises. The company's platform integrates offensive and defensive capabilities, including autonomous cyber systems, to help organizations protect against evolving AI-driven threats and test AI applications, models, and workflows.
HackerOne provides a continuous threat exposure management platform that helps organizations discover, prioritize, and remediate security vulnerabilities. The platform combines AI-driven testing tools, continuous penetration testing, AI red teaming, and crowdsourced security insights from ethical hackers to protect applications, cloud environments, and AI systems.
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More on Horizon3 AI in Xcout Intel
- 15 named people with titles, LinkedIn and board committees
- 1 funding round with the investors in each, and who they co-invest with
- Weekly hiring history and the mix of roles behind it
- 1 corporate event with sources — deals, leadership changes, layoffs
- The full competitor set, tracking, exports and API access