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Horizon3 Promotes Ellen Sundra as Chief Customer Officer

PRIVATEOct 14, 2026

Position

Chief Customer Officer

Company

Horizon 3 AI

Ellen Sundra
San FranciscoInformation TechnologyScience And EngineeringSecurityNetwork Security

Description

Horizon3 today announced the promotion of Ellen Sundra to Chief Customer Officer. Sundra, formerly Vice President of Customers, will lead various customer-facing teams to improve customer success and security outcomes.

Company Information

Company

Horizon 3 AI

Location

447 Battery Street

San Francisco, California, United States

About

Horizon3.ai's mission is to help you find and fix attack vectors before attackers can exploit them. NodeZero, our autonomous penetration testing solution, is a true self-service SaaS offering that is safe to run in production and requires no persistent or credentialed agents. You will see your enterprise through the eyes of the attacker, identify your ineffective security controls, and ensure your limited resources are spent fixing problems that can actually be exploited. Founded in 2019 by industry, US Special Operations, and US National Security veterans, Horizon3.ai is headquartered in San Francisco, CA, and made in the USA.

Fundz sees it the moment Horizon 3 AI changes its leadership, hires an exec or expands, usually minutes after it happens, and tells you who to reach.

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Horizon 3 AI changed its leadership. Fundz had it the day it was filed, with the decision-maker at the company attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include FundzWatch™ for automated website change detection, Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.