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Harmonic Security

As of 14 Oct 2026, Harmonic Security has raised $50M across 1 verified round on record, plus 1 round still being checked; latest: $50 million Series B led by Crosspoint Capital Partners, announced 14 Oct 2026.

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AI Governance & Control Platform

harmonic.securityLinkedInSAN FRANCISCO & LONDONCybersecurityFounded 2023More than 90 people across the United States and the United Kingdom

LATEST ROUND

Series B

$50M · 2026-10-14

RAISED ON RECORD · USD

$50M

1 verified round · $76M to date, as reported · plus 1 round still being checked

INVESTORS

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Every round on record, with the sources behind each and the investors on them.

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Rounds

[ 2 ]

Series B

$50M · 2026-10-14

led by Crosspoint Capital Partners

Series A

$17.5M · 2024-10-02

[ HISTORY ]

led by Next47

Round	Amount	Announced	Lead	Buzz
Series B	$50M $76M to date	2026-10-14	Crosspoint Capital Partners	9 outlets. #23 in Trending
10 sources · checked 1 time, last 1h ago [ VERIFIED ] read against 1 of 10 sources The article mentions total funding of $76 million, but does not identify it as a series running total; it is therefore not reported as financing_total.

Company research

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Harmonic Security builds an AI Governance and Control platform that helps security leaders secure and enable workforce AI use by understanding user intent and data context in real time.

Founders

Alastair Paterson · CEO & co-founder
He was founder and CEO of Digital Shadows from its inception in 2011 until its acquisition by ReliaQuest/KKR for $160m in July 2022, leading the company in threat intelligence and digital risk protection.
Bryan Woolgar-O'Neil · CTO & co-founder
He was the Chief Technology Officer at Digital Shadows, where he developed its flagship SearchLight product into a Forrester-recognized leader in digital risk protection.

Total raised

$76 million · as its sources put it, more than the rounds on record

Customers

Advisor360°, Monolithic Power Systems

Competitors

Zscaler, Netskope, Microsoft Purview

WHY IT MATTERS

Harmonic targets the gap created by shadow and agentic AI: employees and agents use many AI tools and may expose sensitive data, while traditional DLP and network-only controls can miss context and off-network activity. Its bet is context-aware small-language-model controls that warn, coach, log, or block without shutting down legitimate work; its October 14, 2026 Series B announcement says it protects AI use for millions of employees at more than 100 companies and has grown to more than 90 people.

Series A [ HISTORY ]: An earlier round, from the company's own announcement, found while researching the company. Checked like any round, but not new, so it stays out of the daily feed and alerts; a date range shows it.	$17.5M $26M to date	2024-10-02	Next47	No recent discussion
2 sources [ DEVELOPING ] Developing: it holds up against its sources so far, and firms up as more reporting lands. read against 1 of 2 sources Ten Eleven Ventures is mentioned as the investor that led Harmonic’s earlier $7M seed round, not as an investor in this Series A. The source also reports more than $26M in total funding since launch, which is not this round’s amount or a series running total. [ BUILT WITH ]·[ SEARCH ]found by Firecrawl search·[ SCRAPE ]2 pages read: tech.eu, venturebeat.com·[ JSON ]round read into a schema, with the sentence that states it·[ VERIFY ]confirmedchecked against 1 of 2 sources·[ BRANDING ]logo and colour from the homepage·[ AGENT ]company research by the Firecrawl agent

Harmonic Security

Company

Rounds

Sources

Profile

Investors

Harmonic Security

Rounds

Company research

Sources

Series B$50M2026-10-1410 sources

Series A$17.5M2024-10-022 sources

Profile

Investors

Series B$50M2026-10-141 investor

Series A$17.5M2024-10-021 investor