HEAD-TO-HEAD · FACTS ONLY
Ent vs Harmonic: AI endpoint control facts side by side
Short answer
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: Ent
- Dashed teal ring: Harmonic, 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)
What are the facts, side by side?
| Fact | Ent | Harmonic |
|---|---|---|
| Owner | None | None |
| Positioning | An intent-aware AI endpoint: one programmable policy for people and AI agents, with interventions from a soft nudge to a hard block, an on-device small language model that classifies sensitive data, and investigation timelines written in plain language. Use cases: insider risk, last-mile threats such as ClickFix, AI usage control and data security. | 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. |
| How it reaches devices | A single lightweight agent across Windows, macOS, Linux and modern browsers, run as SaaS or self-hosted in your own cloud; rollout through MDM is not stated. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | Rolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| On-device controlDiffers | DescribedA single lightweight agent across Windows, macOS and Linux with one programmable policy for people and AI agents. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | 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 |
| Browser extension | DescribedBrowser-extension deployments generally available at launch. Source: Ent press: $100M seed, 16 June 2026 · Read 13 Oct 2026 | DescribedBrowser extensions are a listed surface, with block, warn or log actions. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| 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 | Not in our sourcesNot described on the pages we read. | 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 |
| Names the coding agents it covers | MatchesNames OpenAI Codex, Claude Code, Claude Cowork, GitHub Copilot and Cursor. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | 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 |
| Decides on a tool call before it runs | PartlyBlocks risky agent behavior where needed; per-tool-call mechanics are not described. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | 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 |
| Controls what goes into browser AIDiffers | PartlyClassifies sensitive data at the point of use on the device and in browsers; prompt-level controls are not detailed. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | MatchesBlock, warn or log on AI use in the browser. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| Rolls out through EDR or device management you runDiffers | Not in our sources | MatchesRolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| Can warn or ask instead of only blocking | MatchesInterventions range from a soft nudge to a hard block. Source: Ent homepage · Read 13 Oct 2026 | MatchesWarn is one of three actions, with block and log. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| Can block an agent, tool or action | MatchesA hard block is one of its interventions. Source: Ent homepage · Read 13 Oct 2026 | MatchesBlock is one of three actions. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| Has a watch-only or simulation modeDiffers | Not in our sources | MatchesLog is one of three actions, for watching before enforcing. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| Records who or what took each actionDiffers | MatchesNatural-language investigation timelines. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | Not in our sources |
| Also covers SaaS, cloud or homegrown AIDiffers | Not in our sources | PartlyAn API is listed alongside device surfaces; SaaS or cloud agents are not described. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| Has a public price or tiers (vendor site or marketplace)Differs | Not in our sources | PartlyNames three tiers (Explore, Guide, Command) on its pricing page, without prices. Source: Harmonic Security: pricing · Read 27 Sep 2026 |
| Built into | None | None |
| Works with | None in our sources | None in our sources |
| Price | Not published (demo request). Source: Ent homepage · Read 13 Oct 2026 | 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 |
Where do they differ?
- On-device control: Ent describes it; Harmonic partly describes it.
- AI or MCP gateway: Ent is not in our sources; Harmonic describes it.
- Controls what goes into browser AI: Ent partly matches; Harmonic matches.
- Rolls out through EDR or device management you run: Ent is not in our sources; Harmonic matches.
- Has a watch-only or simulation mode: Ent is not in our sources; Harmonic matches.
- Records who or what took each action: Ent matches; Harmonic is not in our sources.
- Also covers SaaS, cloud or homegrown AI: Ent is not in our sources; Harmonic partly matches.
- Has a public price or tiers (vendor site or marketplace): Ent is not in our sources; Harmonic partly matches.
Choose Ent if
- You want one policy for people and AI agents, with nudges as well as blocks
- You need device and browser coverage from one agent
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
Which limits should you check?
Ent
- Per-tool-call mechanics and rollout through MDM are not described on the pages we read.
- Uses its own agent, and no price is published.
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.