Harmonic Security
SAN FRANCISCO, California · Information Technology
Harmonic Security gives security teams the tools to protect sensitive data without the headaches of labeling and complex rules. Our pre-trained data protection models enable secure innovation through user education and gentle nudges. Recognized as an RSA Innovation Sandbox finalist in 2024, Harmonic Security redefines data protection for the GenAI era.
Key facts
- Headquarters
- SAN FRANCISCO, California
- Employees
- 87
- Industries
- Information Technology
- Status
- Private
- Website
- www.harmonic.security
- Company page
Recent activity at Harmonic Security
- : Harmonic Security raises $50 million in Series B funding led by Crosspoint Capital Partners to accelerate AI adoption for millions of employees.
- : Harmonic Security
- : Harmonic Security raised $17.5 million in a Series A led by Next47 to accelerate its zero-touch data protection capabilities in the market.
- : Harmonic Security Appoints Mark Sutton as Managing Director and Chief Information Security Officer
- : Harmonic Security
- : Harmonic Security
Harmonic Security funding history
| Date | Round | Amount |
|---|---|---|
| Oct 2026 | Series B | $50.0M |
| Oct 2024 | Venture | $17.2M |
| Oct 2024 | Series A | $17.5M |
| Jan 2024 | Venture | $8.5M |
| Oct 2023 | Venture | $8.5M |
Leadership
- Mark Sutton, Board Member
- Bryan Woolgar-O'Neil, Executive Officer
- Alastair Paterson, Executive Officer
Verified email and direct lines for Harmonic Security’s decision-makers are on Fundz. See plans — or book a 15-minute walkthrough.
Employee benefit plans
Harmonic Security files 1 employee benefit plan with the U.S. Department of Labor, including a retirement plan. The next plan year renews in Dec 2026.
Harmonic Security in the news
- Harmonic Security Raises $50 Million Series B, Enabling Safe AI Adoption for Millions More Employees - Yahoo Finance (Oct 14, 2026)
- Harmonic Security secures $50 million in a Series B round. - CyberWire (Oct 14, 2026)
- Harmonic Security Raises $50M to Expand AI Security Platform - Ventureburn (Oct 15, 2026)
- How Harmonic Security improved their data-leakage detection system with low-latency fine-tuned models using Amazon SageMaker, Amazon Bedrock, and Amazon Nova Pro - Amazon Web Services (AWS) (Dec 11, 2025)
- Employees Use Their Personal AI Accounts for Work 64% of the Time, Potentially Invisible to Their Employers, Research Finds - Business Wire (May 20, 2026)
- Climb Signs Distribution Agreement with Harmonic Security to Help Secure Mid-Market & Enterprise AI Adoption - GlobeNewswire (Aug 05, 2026)
- Harmonic AI raises $120M at $1.45B valuation to advance mathematical reasoning - SiliconANGLE (Nov 25, 2025)
- Harmonic Security raises $17.5M Series A - VentureBeat (Oct 02, 2024)
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About Harmonic Security: questions and answers
What does Harmonic Security do?
Harmonic Security gives security teams the tools to protect sensitive data without the headaches of labeling and complex rules. Our pre-trained data protection models enable secure innovation through user education and gentle nudges. Recognized as an RSA Innovation Sandbox finalist in 2024, Harmonic Security redefines data protection for the GenAI era.
Where is Harmonic Security headquartered?
Harmonic Security is headquartered in SAN FRANCISCO, California.
How many employees does Harmonic Security have?
Harmonic Security has about 87 employees.
Has Harmonic Security raised funding?
Yes. Fundz has recorded 5 funding events for Harmonic Security. The most recent, Series B of $50.0M, was in Oct 2026.
What is the latest news on Harmonic Security?
On Oct 14, 2026, Harmonic Security raises $50 million in Series B funding led by Crosspoint Capital Partners to accelerate AI adoption for millions of employees.
Source: Fundz records from SEC filings, press releases and company announcements. How Fundz measures data accuracy