Who owns Harmonic Security?

Harmonic Security is a privately held company. It is backed by 11 investors on record, including Crosspoint Capital Partners and Next47.

Where is Harmonic Security headquartered?

Harmonic Security is headquartered in San Francisco, United States.

Who is the CEO of Harmonic Security?

Alastair Paterson is the CEO of Harmonic Security.

Who founded Harmonic Security?

Alastair Paterson and Bryan Woolgar-O'Neil are co-founders of Harmonic Security, founded in 2023.

What products does Harmonic Security sell?

Harmonic Security sells Harmonic Secure AI.

Harmonic Security

AI SecuritySan Francisco, United Statesfounded 2023privateharmonic.security ↗

Harmonic Security is a cybersecurity company specializing in AI Security, founded in 2023 and headquartered in San Francisco, United States. It has raised $74.5M in equity across 4 priced rounds, employs about 86 people, and is privately held.

Unlock full profile Book a demo Unlock full profile Book a demo

updated Oct 23, 2026

Latest Harmonic Security news and company activity

What Harmonic Security did, dated — selected moves from the record, one per kind, newest first.

Oct 2026RecognitionHarmonic Security Ranked #15 on Sifted's AI 100
Oct 2026Funding roundHarmonic Security raises $50M Series B
Dec 2025Exec changeSue-wei A Chen joins Harmonic Security as Vice President Finance
Oct 2025Product launchHarmonic Security Launches MCP Gateway – Providing Complete Visibility and Control Over an Organization's Agentic AI Ecosystem

Harmonic Security Momentum score

48/ 100

Mandos Momentum blends hiring, funding, traffic and sentiment into one score out of 100. The score is free; the pillars behind it unlock in the platform.

Growthlocked

Marketlocked

Financiallocked

Harmonic Security products

Harmonic Secure AISecurity platform for GenAI adoption with data protection and Shadow AI detectionDetails ↗

Harmonic Security funding

Harmonic Security has raised $74.5M in priced equity. Its most recent round was a Series B in October 2026. It has 4 funding rounds on record: Seed, Seed, Series A, and Series B. 11 investors are on record, including Crosspoint Capital Partners and Next47.

Equity raised: $74.5M4 priced rounds
Last round: Series BOct 2026

View the complete funding history

Harmonic Security employees and hiring

As of September 2026, Harmonic Security has about 86 employees, up 6% over the last 30 days, with 5 open roles.

Employees: 86
30-day change: +6%
Open roles: 5

See hiring trends

Harmonic Security competitors

Competitors of Harmonic Security include Duality Technologies. The full competitive set, with overlap scoring, is in the platform.

Duality Technologies

ranked by CybersecTools comparison demand, 90 days

View the competitive set with overlap scores

Get the Mandos Brief, free.

A free Mandos account opens 1 full company profile a month, the moment you click, plus our research articles and the Mandos Brief every Monday. Use your work email.

One full company profile a month
The full Mandos Pacesetters analysis, each quarter
Research articles
The Mandos Brief every Monday

Create a free account

Free with your work email. No card. Includes the Mandos Brief every Monday.

Get the Mandos Brief, free.

A free Mandos account opens 1 full company profile a month, the moment you click, plus our research articles and the Mandos Brief every Monday. Use your work email.

One full company profile a month
The full Mandos Pacesetters analysis, each quarter
Research articles
The Mandos Brief every Monday

Create a free account

Free with your work email. No card. Includes the Mandos Brief every Monday.

The other 440 data points.

Funding historyevery round, every investor named
Headcount growthvelocity, departments, seniority
Open jobs5 live postings, role mix
Tech stackframeworks, clouds, security
Competitorsfull set, overlap scored
Leadershipevery exec, with roles
Customersnamed publicly, with sources
Reviews & newssentiment, coverage, cadence

Create a free account to unlock the full profile of Harmonic Security.

A free account opens 1 full company profile a month, the moment you click. Mandos Analyst opens 25.

Funding, round by round, with the investors
Headcount, hiring and the people
The timeline of what they did, dated
The Mandos Brief every Monday

Create a free account

Free with your work email. No card. Includes the Mandos Brief every Monday.

The other 440 data points.

Funding historyevery round, every investor named
Headcount growthvelocity, departments, seniority
Open jobs5 live postings, role mix
Tech stackframeworks, clouds, security

Similar in AI Security

Common questions about Harmonic Security.

How much funding has Harmonic Security raised?: Harmonic Security has raised $74.5M in priced equity. Its most recent round was a Series B in October 2026. It has 4 funding rounds on record: Seed, Seed, Series A, and Series B. 11 investors are on record, including Crosspoint Capital Partners and Next47.
How many people work at Harmonic Security?: As of September 2026, Harmonic Security has about 86 employees, up 6% over the last 30 days, with 5 open roles.
Who owns Harmonic Security?: Harmonic Security is a privately held company. It is backed by 11 investors on record, including Crosspoint Capital Partners and Next47.
Where is Harmonic Security headquartered?: Harmonic Security is headquartered in San Francisco, United States.
Who is the CEO of Harmonic Security?: Alastair Paterson is the CEO of Harmonic Security.
Who founded Harmonic Security?: Alastair Paterson and Bryan Woolgar-O'Neil are co-founders of Harmonic Security, founded in 2023.
Who are Harmonic Security's competitors?: Competitors of Harmonic Security include Duality Technologies. The full competitive set, with overlap scoring, is in the platform.