HEAD-TO-HEAD · FACTS ONLY
Bloom vs Harmonic: AI endpoint control facts side by side
Short answer
Bloom describes 0 of the four product control types on the pages we read and Harmonic describes 2; they differ on browser extension and AI or MCP gateway. On decisions, Bloom describes some control over tool calls and Harmonic 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: Bloom
- 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 | Bloom | Harmonic |
|---|---|---|
| Owner | None | None |
| Positioning | An endpoint security company built around "Securing the AI-Native Endpoint": discovery of the software, extensions and AI tools running on devices, with policy enforcement across package and extension marketplaces. Offices in Wilmington, Delaware and Tel Aviv. | 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 | Deployment method not published on the pages we read (re-checked 11 October 2026). Source: Bloom Security homepage · Read 27 Sep 2026 | Rolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| On-device control | Partly describedDiscovers software, extensions and AI on the endpoint and automatically scales back overpermissioned MCP servers; how it reaches the device is not published. Source: Bloom Security homepage · Read 27 Sep 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 extensionDiffers | Not in our sourcesNot described on the pages we read. | 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 coversDiffers | Not in our sources | 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 | PartlyAutomatically scales back overpermissioned MCP servers; decisions on individual calls are not described. Source: Bloom Security homepage · Read 27 Sep 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 | Not in our sources | 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 blockingDiffers | Not in our sources | MatchesWarn is one of three actions, with block and log. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| Can block an agent, tool or actionDiffers | PartlyEnforces policies across npm, Chrome Web Store and Open VSX. Source: Bloom Security homepage · Read 27 Sep 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 action | Not in our sources | 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. Source: Bloom Security homepage · Read 27 Sep 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?
- Browser extension: Bloom is not in our sources; Harmonic describes it.
- AI or MCP gateway: Bloom is not in our sources; Harmonic describes it.
- Names the coding agents it covers: Bloom is not in our sources; Harmonic matches.
- Controls what goes into browser AI: Bloom is not in our sources; Harmonic matches.
- Rolls out through EDR or device management you run: Bloom is not in our sources; Harmonic matches.
- Can warn or ask instead of only blocking: Bloom is not in our sources; Harmonic matches.
- Can block an agent, tool or action: Bloom partly matches; Harmonic matches.
- Has a watch-only or simulation mode: Bloom is not in our sources; Harmonic matches.
- Also covers SaaS, cloud or homegrown AI: Bloom is not in our sources; Harmonic partly matches.
- Has a public price or tiers (vendor site or marketplace): Bloom is not in our sources; Harmonic partly matches.
Choose Bloom if
- Your first worry is unvetted extensions and packages arriving on developer machines
- You want an inventory of everything on the endpoint before you write AI-specific rules
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?
Bloom
- Deployment method and pricing are not published.
- Decisions on individual tool calls and an activity record are not described on the pages we read.
- Limited company information on its own pages: they do not name investors; funding is known from press coverage (Ctech, 30 July 2026).
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.