Harmonic Security
Govern AI wherever your workforce runs it.
$50M Series B+ ·
Led by Crosspoint · Source: unite.ai
Total raised: $67.5M across 2 sourced rounds
All 2 rounds ↓About Harmonic Security
Detect shadow AI, prevent data leaks, and coach employees inline — across web, desktop, and agentic workflows.
Harmonic Security is a company based in San Francisco, United States, founded in 2023. Recent Funding lists it under AI agents (also Cybersecurity). It raised $50M in a Series B+ round in October 2026, led by Crosspoint, according to unite.ai. Recent Funding has 2 sourced rounds on record for it, totaling $67.5M, the first in October 2024. Investors on record include Claroty, Daniel Bernard, IQT, N47 and 3 others. It was founded by Alastair Paterson, Bryan Woolgar-O'Neil and James Derbyshire.
Harmonic Security | 427 days from website to first raise on record
Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.
Funding rounds
- Series B+ · $50M
CCrosspoint (lead)
Source: unite.ai - Series A · $17.5MSource: harmonic.security
- X account created
- Website created
Founders and team
AP
Alastair Paterson FounderBW
Bryan Woolgar-O'Neil FounderJD
James Derbyshire VP Strategic Partnerships / Founding Executive
Investors
CClaroty
DDaniel Bernard
IIQT
NN47lead investor
SStepStone Group
SSysdig
TTen Eleven Ventures
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Questions and sources
Harmonic Security: questions and answers
- How much has Harmonic Security raised?
- Harmonic Security has raised $67.5M across 2 sourced rounds on record. The latest is $50M (Series B+), announced October 14, 2026.
- Who invested in Harmonic Security?
- Investors on record for Harmonic Security: Claroty, Crosspoint, Daniel Bernard, IQT, N47, StepStone Group, Sysdig and Ten Eleven Ventures. Crosspoint led its latest sourced round.
- Who founded Harmonic Security?
- Harmonic Security was founded by Alastair Paterson, Bryan Woolgar-O'Neil and James Derbyshire (VP Strategic Partnerships / Founding Executive).
- Where is Harmonic Security based?
- Harmonic Security is based in San Francisco, United States and was founded in 2023.
Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/harmonic-security (get a free API key).