Is Harmonic or Pluto better for AI endpoint control?

Neither is scored on this site. Harmonic describes 2 of four product control types and Pluto 0 on the pages we read, and they differ on 10 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. Pluto: Partly. Warn or ask: Harmonic Matches, Pluto Not in our sources.

Do Harmonic or Pluto 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. Pluto: Not published (demo request).

HEAD-TO-HEAD · FACTS ONLY

Harmonic vs Pluto: AI endpoint control facts side by side

Short answer

Harmonic describes 2 of the four product control types on the pages we read and Pluto describes 0; they differ on browser extension and AI or MCP gateway. On decisions, Harmonic describes some control over tool calls and Pluto 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: Pluto, 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 Pluto Security, from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	Harmonic	Pluto
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.	"The first workspace security platform for the AI era": visibility, risk understanding and real-time guardrails for AI builders, developer tools and business workspaces. Founding team from Unit 8200, Microsoft and Palo Alto Networks; part of AWS, CrowdStrike and NVIDIA accelerators. Publishes research on Claude Code hooks, exposed MCP servers and Open VSX malware.
How it reaches devices	Rolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026	(secondary: SACR) Agentless, through API integrations and existing CrowdStrike, Defender and MDM infrastructure. Pluto's own site has no product or documentation page describing rollout. Source: SACR (secondary): CISO guide to endpoint control and prevention, July 2026 · Read 13 Oct 2026 · secondary source
On-device control	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	Partly described(secondary: SACR) inline hook configuration on coding agents for runtime observability and enforcement. Source: SACR (secondary): CISO guide to endpoint control and prevention, July 2026 · Read 13 Oct 2026 · secondary source
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 coversDiffers	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	PartlyPluto's research covers Claude Code; SACR (secondary) says it governs tools such as ChatGPT, Claude and Copilot. Source: SACR (secondary): CISO guide to endpoint control and prevention, July 2026 · Read 13 Oct 2026 · secondary source
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	Partly(secondary: SACR) inline hooks on coding agents for runtime enforcement. Source: SACR (secondary): CISO guide to endpoint control and prevention, July 2026 · Read 13 Oct 2026 · secondary source
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 runDiffers	MatchesRolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026	Partly(secondary: SACR) deploys through existing CrowdStrike, Defender and MDM infrastructure. Source: SACR (secondary): CISO guide to endpoint control and prevention, July 2026 · Read 13 Oct 2026 · secondary source
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	Not in our sources
Can block an agent, tool or actionDiffers	MatchesBlock is one of three actions. Source: Harmonic Security homepage · Read 27 Sep 2026	Not in our sources
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 action	Not in our sources	Not in our sources
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	Not in our sources
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	Not in our sources
Built into	None	None
Works with	None in our sources	(secondary: SACR) deploys through existing CrowdStrike, Defender and MDM infrastructure. (secondary: SACR) deploys through existing CrowdStrike, Defender and MDM infrastructure. Source: SACR (secondary): CISO guide to endpoint control and prevention, July 2026 · Read 13 Oct 2026 · secondary source
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	Not published (demo request). Source: Pluto Security homepage · Read 13 Oct 2026

Where do they differ?

Browser extension: Harmonic describes it; Pluto is not in our sources.
AI or MCP gateway: Harmonic describes it; Pluto is not in our sources.
Names the coding agents it covers: Harmonic matches; Pluto partly matches.
Controls what goes into browser AI: Harmonic matches; Pluto is not in our sources.
Rolls out through EDR or device management you run: Harmonic matches; Pluto partly matches.
Can warn or ask instead of only blocking: Harmonic matches; Pluto is not in our sources.
Can block an agent, tool or action: Harmonic matches; Pluto is not in our sources.
Has a watch-only or simulation mode: Harmonic matches; Pluto is not in our sources.
Also covers SaaS, cloud or homegrown AI: Harmonic partly matches; Pluto is not in our sources.
Has a public price or tiers (vendor site or marketplace): Harmonic partly matches; Pluto is not in our sources.

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 Pluto if

You want guardrails on coding agents without a new endpoint 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.

Pluto

Pluto publishes little product detail on its own site, so this profile relies partly on a third-party report.
No price is published.

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