Is Harmonic or Noma better for AI endpoint control?

Neither is scored on this site. Harmonic describes 2 of four product control types and Noma 1 on the pages we read, and they differ on 9 recorded facts. Which fits depends on the AI tools people use, your devices, where the work happens and whether you block or guide; the finder checks those.

Which of the two decides on a tool call before it runs?

Harmonic: Partly. Noma: Partly. Warn or ask: Harmonic Matches, Noma Partly.

Do Harmonic or Noma publish prices?

Harmonic: Three named tiers (Explore, Guide, Command) with no prices; a full prompt audit log is an add-on on Guide and Command. Noma: Marketplace list price: $200,000 for a 12-month contract on AWS Marketplace. No pricing page on noma.security.

HEAD-TO-HEAD · FACTS ONLY

Harmonic vs Noma: AI endpoint control facts side by side

Short answer

Harmonic describes 2 of the four product control types on the pages we read and Noma describes 1; they differ on on-device control, browser extension and AI or MCP gateway. On decisions, Harmonic describes some control over tool calls and Noma describes some control over tool calls. We do not score either; the right choice depends on the AI tools people use, your devices, your current stack and whether you block or guide.

By The Device Desk · Endpoint AI Finder · Published 2026-10-11

Desk research from public vendor pages read on 27 September and 11 October 2026. Profiles follow our published method; we did not run the products.

Vendor pages read September and October 2026 · updated 2026-10-13

Where do their controls sit?

Filled or hatched marker: Harmonic
Dashed teal ring: Noma, described

DEV Filled marker: described on the product pages we read
DEV Hatched marker: partly described (another component, a narrower scope, or method not detailed)
DEV Dashed marker: not in our sources (it may exist; we did not find it)

The map shows where each product's own pages describe a control, or where your answers point. It is not a measure of how well a product works.

What are the facts, side by side?

Harmonic Security and Noma Security, from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	Harmonic	Noma
Owner	None	None
Positioning	A data protection product for everyday AI use, sold as Explore, Guide and Command, covering browser extensions, desktop apps and CLI tools, MCP gateways and an API.	An AI security platform with AI-SPM, Agent Access Control, AI detection and response and AI red teaming, covering agents on endpoints, in SaaS and in homegrown apps.
How it reaches devices	Rolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026	Discovers endpoint agents through your existing EDR or MDM, with no new endpoint agent to deploy. Source: Noma Security: endpoint agents · Read 27 Sep 2026
On-device controlDiffers	Partly describedDeployment options include desktop apps and AI agents, rolled out through device management; the on-device component is not described in detail. Source: Harmonic Security pricing (re-read) · Read 11 Oct 2026	DescribedDiscovers endpoint agents such as Claude Code, Cursor and Codex with their MCP servers and skills, blocks unauthorized and malicious ones, and inspects activity at runtime. Source: Noma Security: endpoint agents · Read 27 Sep 2026
Browser extensionDiffers	DescribedBrowser extensions are a listed surface, with block, warn or log actions. Source: Harmonic Security homepage · Read 27 Sep 2026	Not in our sourcesNot described on the pages we read.
Network or SSE proxy	Not in our sourcesNot described on the pages we read.	Not in our sourcesNot described on the pages we read.
AI or MCP gatewayDiffers	DescribedMCP gateways are a listed surface, and Harmonic Command governs at the MCP layer and at the tool surface. Source: Harmonic Security: Command · Read 27 Sep 2026	Not in our sourcesNot described on the pages we read.
Names the coding agents it covers	MatchesThe Guide tier adds desktop AI apps and developer tools, naming Claude Code, GitHub Copilot, ChatGPT Desktop and Microsoft 365 Copilot. Source: Harmonic Security pricing (re-read) · Read 11 Oct 2026	MatchesNames Claude Code, Cursor and Codex. Source: Noma Security: endpoint agents · Read 27 Sep 2026
Decides on a tool call before it runs	PartlyThe Command tier adds MCP client and server discovery, agent permissions for read, write and execute, and MCP server tool controls. Source: Harmonic Security pricing (re-read) · Read 11 Oct 2026	PartlyRuntime inspection of the event, the session, the identity behind the agent and the data it reaches; decisions on individual tool calls are described less specifically. Source: Noma Security: endpoint agents · Read 27 Sep 2026
Controls what goes into browser AIDiffers	MatchesBlock, warn or log on AI use in the browser. Source: Harmonic Security homepage · Read 27 Sep 2026	Not in our sources
Rolls out through EDR or device management you run	MatchesRolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026	MatchesThrough your existing EDR or MDM, with no new endpoint agent. Source: Noma Security: endpoint agents · Read 27 Sep 2026
Can warn or ask instead of only blockingDiffers	MatchesWarn is one of three actions, with block and log. Source: Harmonic Security homepage · Read 27 Sep 2026	PartlyStates that runtime decisions can route to a human. Source: Noma Security: endpoint agents (re-read) · Read 13 Oct 2026
Can block an agent, tool or action	MatchesBlock is one of three actions. Source: Harmonic Security homepage · Read 27 Sep 2026	MatchesBlocks unauthorized and malicious agents. Source: Noma Security: endpoint agents · Read 27 Sep 2026
Has a watch-only or simulation modeDiffers	MatchesLog is one of three actions, for watching before enforcing. Source: Harmonic Security homepage · Read 27 Sep 2026	Not in our sources
Records who or what took each actionDiffers	Not in our sources	PartlyKeeps a live registry of allowed agents, MCP servers and skills and inspects the identity behind each agent. Source: Noma Security: endpoint agents · Read 27 Sep 2026
Also covers SaaS, cloud or homegrown AIDiffers	PartlyAn API is listed alongside device surfaces; SaaS or cloud agents are not described. Source: Harmonic Security homepage · Read 27 Sep 2026	MatchesCovers endpoint, SaaS and homegrown agents. Source: Noma Security homepage · Read 27 Sep 2026
Has a public price or tiers (vendor site or marketplace)Differs	PartlyNames three tiers (Explore, Guide, Command) on its pricing page, without prices. Source: Harmonic Security: pricing · Read 27 Sep 2026	MatchesAWS Marketplace lists the Noma Security Platform at $200,000 for a 12-month contract (marketplace list price); noma.security has no pricing page. Source: AWS Marketplace: Noma Security Platform · Read 11 Oct 2026
Built into	None	None
Works with	None in our sources	None in our sources
Price	Three named tiers (Explore, Guide, Command) with no prices; a full prompt audit log is an add-on on Guide and Command. Source: Harmonic Security pricing (re-read) · Read 11 Oct 2026	Marketplace list price: $200,000 for a 12-month contract on AWS Marketplace. No pricing page on noma.security. Source: AWS Marketplace: Noma Security Platform · Read 11 Oct 2026

Where do they differ?

On-device control: Harmonic partly describes it; Noma describes it.
Browser extension: Harmonic describes it; Noma is not in our sources.
AI or MCP gateway: Harmonic describes it; Noma is not in our sources.
Controls what goes into browser AI: Harmonic matches; Noma is not in our sources.
Can warn or ask instead of only blocking: Harmonic matches; Noma partly matches.
Has a watch-only or simulation mode: Harmonic matches; Noma is not in our sources.
Records who or what took each action: Harmonic is not in our sources; Noma partly matches.
Also covers SaaS, cloud or homegrown AI: Harmonic partly matches; Noma matches.
Has a public price or tiers (vendor site or marketplace): Harmonic partly matches; Noma matches.

Choose Harmonic if

Your main risk is employees pasting sensitive data into AI tools and you would rather coach than block
You manage devices with Intune, JAMF, Kandji or Group Policy

Choose Noma if

Agents run on laptops, in SaaS and in apps you build, and you want one place to see them
You want discovery through existing EDR or MDM without a new agent

Which limits should you check?

Harmonic

Tier names only, no prices, and the full prompt audit log is an add-on.
An activity record that separates a person from an agent is not described, and prompt injection protection is listed as coming soon.

Noma

A watch-only or simulation mode is not described on the pages we read.
Decisions on individual tool calls are described less specifically than discovery, and the only public price is a $200,000 a year marketplace listing.

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