Every category where a model named Harmonic Security for a mid-market B2B company. Share is first choices across the direct, paraphrase, budget and scale prompts; rank is within every product named in that category.

Category	Function	Share	Rank	Negative rate	Labels	Quadrant	Since September 2026
AI security platforms	Security operations	4%	4 of 233	0%	5	under 10 labels · led by SentinelOne Singularity at 11%
AI governance platforms	Data platform	0%	41 of 135	0%	2	under 10 labels · led by Credo AI at 18%

Movement

This is the first edition on this tier, so no move can be computed for Harmonic Security yet. From the next edition this section shows, per buyer segment and per category, whether its share moved by more than the measured noise floor.

By model

How each model treated Harmonic Security across every prompt where it was named for a mid-market B2B company. Fourteen models, six prompts per category.

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Model	First choice	Alternative	Mention	Labels
Claude Haiku 4.5	0	0	0	0
GPT-5.4 mini	1	0	0	1
Gemini 3.5 Flash	1	1	0	2
Perplexity Sonar	0	0	0	0
Grok 4.1 Fast	0	0	0	0
Mistral Small	0	1	0	1
DeepSeek V4 Flash	0	0	0	0
Llama 4 Maverick	0	0	1	1
Qwen 3.7 Flash	0	0	0	0
Kimi K2	0	2	0	2
GLM 4.7 FlashX	0	0	0	0
MiniMax M2.5	0	0	0	0
GPT-6 Luna	0	0	0	0
Muse Glimmer 30B	0	0	0	0

By framing

Which of the six questions produced the naming. By model says how often; this says asked what. The first-choice count on the right carries the marks of the models that produced it.

FramingLabels by classFirst choices

Direct2 labels1

Paraphrase3 labels1

Comparative3 labelsNone

Budget-constrained0 labelsNone

Scale-constrained0 labelsNone

Negative3 labelsNone

First choiceAlternativeMentionNegative11 labels in all, every segment counted; 2 of the 2 first choices count toward share, since the comparative and negative framings do not. The bar is one segment per label class, to scale within the framing.

What the models said for it

Verbatim evidence the judge attached to positive labels.

“I'd recommend starting with Harmonic Security if your top priority is controlling employee AI use” GPT-5.4 mini · AI security · paraphrase prompt · first choice

“Top Pick: Harmonic Security ... Go with Harmonic Security” Gemini 3.5 Flash · AI security · direct prompt · first choice

“If your risk is employees pasting company secrets into ChatGPT/Claude, look at Harmonic Security or Prompt Security.” Gemini 3.5 Flash · AI security · comparative prompt · alternative

“supplement such tools with a platform that provides this capability (e.g., Zenity, Pillar Security, or Harmonic Security)” Mistral Small · AI governance · negative prompt · alternative

And against it

Verbatim evidence attached to negative labels. A warning on a product with few labels is a warning; on a product with many, it is one voice among them.

No model argued against it.

Named alongside

The products named in the same answers as Harmonic Security, over the 11 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Harmonic Security was named but was not.

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ProductSame answerTook the first choice insteadHead to head

Prompt Security6 of 111Not among the top eight

Zenity6 of 111Not among the top eight

Credo AI5 of 111Not among the top eight

Pillar Security5 of 110Not among the top eight

Lakera Guard4 of 110Not among the top eight

Nudge Security3 of 111Not among the top eight

Arize AI3 of 110Not among the top eight

Fiddler AI3 of 110Not among the top eight

Holistic AI3 of 110Not among the top eight

IBM watsonx.governance3 of 110Not among the top eight

A head-to-head page exists where both products are among a category's top eight. The other rows are the same fact without a page behind them, so they link to the product instead.

What carried it into the answer

The sites and pages cited by the answers that named Harmonic Security. A fact about retrieval, not a lever on the model.

Citations exist only for the models that return a source list, five of the fourteen in this edition, so these counts come from 11 of the 11 answers that named Harmonic Security and are not a share of its labels.

Domains cited

securityboulevard.com7

nudgesecurity.com5

superblocks.com5

checkpoint.com3

harmonic.securityYour site3

knostic.ai3

sentinelone.com3

theindustryleaders.org3

upguard.com3

witness.ai3

Thirty-five of the thirty-eight domain citations in answers naming Harmonic Security came from somebody else's page.

Pages cited

securityboulevard.com/2026/08/top-ai-governance-platforms-2026-comparison-guide-kovrr6

nudgesecurity.com/post/best-aispm-tools-compared4

superblocks.com/blog/generative-ai-security-tools3

theindustryleaders.org/post/best-ai-spm-vendors-of-2026-a-field-guide-for-security-and-com3

upguard.com/blog/best-ai-governance-platforms3

agility-at-scale.com/ai/governance/ai-governance-tools-and-technology2

difinity.ai/blog/best-ai-governance-platforms2

g2.com/categories/ai-governance-tools2

Pages are listed as the models cited them.

What it publishes

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Addresses on harmonic.security

232

subdomains included

Content

169

counted in the table below

Documentation

Product · Integration

19 · 0

Kind	Pages	Last 90 days	Latest	Categories named
Blog	155	4	2026-09-21	DLP
Comparison	8	0	2025-04-16	SASE, XDR
Conference or event	3	0	2025-04-16
Case study	1	0	2025-04-16
Webinar or virtual event	1	0	2025-08-26
Glossary or explainer	1	undated

Most recent

2026-09-21Agent harnesses are expanding to the cloud blog
2026-08-28Gartner ai usage control research points beyond basic discovery blog
2026-07-22Securing chatgpt work a practitioners guide blog
2026-07-21All organizations now have employees using china based ai tools blog
2026-06-12Securing codex best practice blog
2026-06-08Claude cowork and openai codex are becoming the interfaces for everyday work blog

How it is countedHide how it is counted

Every page harmonic.security exposes, subdomains included. Kind is read from the address and title. The last 90 days, the latest date and the twelve months count pages by when they were published, from the site's feeds, a date in the address, or the page's own publication date, read from up to a hundred of its most recently changed pages; a page that says only when it last changed is counted in its kind but not in when, so the recent counts are a floor, and a kind none of whose pages gives a publication date reads undated. An event counts as online when its address or title says so (webinar, on demand, virtual or online summit); a conference, summit, trade show, expo or roadshow that does not say so is counted as a conference or event, which on a vendor's site is mostly in person. Read October 5, 2026.

Follow Harmonic Security

An email the morning each edition publishes: where this product moved, where it held, and by how much against the noise floor. One address, confirmed by a click; a stop link in every email.

Already following? Everything you follow, with a stop for each.

The company

Harmonic Security is its own company.

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In its own words

Stated by the vendor, not checked

Positioning: AI Governance & Control Platform
harmonic.security
For: security leaders
harmonic.security
Free plan or trial: no signup, no sales call harmonic.security
Integrations claimed: 1000 harmonic.security/products/guide
Certifications: ISO/IEC 27001:2022SOC 2 Type 2HIPAAGDPRCCPAAWS Qualified SoftwareISO/IEC 42001:2023NIST AI RMF
Hosting: EUEU or US
Customers named: ApaxAdvisor360
Not stated on the pages read: Price, starting price

What Harmonic Security's own pages state, read October 6, 2026: harmonic.security, harmonic.security/pricing, trust.harmonic.security, harmonic.security/products/guide. A claimed page can correct any of them.

Is this your product?

Claim this page

Claiming is free and changes nothing in the data. A claimed page shows a verified contact who is told when each edition publishes and when Harmonic Security's standing changes by more than the noise floor; the right to propose corrections to the vendor table, meaning names the judge wrote that should or should not read as Harmonic Security, applied by version and listed in the change log; and a one-line description supplied by the vendor and marked as such.

What a new claim receivesHide what a new claim receives

A new claim receives the current edition's vendor brief for Harmonic Security by email, built from the raw record of the edition. It shows:

where Harmonic Security is named, by buyer and by framing, and which cells hold its first choices;
the claims the models make when they name it, ranked, with the strongest and the weakest quoted;
its vocabulary against the segment leader's, and the pages the models cited;
who was chosen in the answers that did not name Harmonic Security, and every reason the record gives;
a battlecard for each top rival: the head-to-head split, why they win, and the reservation quoted against them;
one page of published figures cleared to show a buyer.