HEAD-TO-HEAD · FACTS ONLY
Glow 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: Glow
- 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 | Glow | Harmonic |
|---|---|---|
| Owner | None | None |
| Positioning | "The Endpoint AI Company": control over everything that runs on the endpoint, in three areas (Asset Intelligence, Software Control, Safe AI Adoption), plus an Anthropic integration that collects per-user Claude usage, skills, connectors and a compliance audit trail. Came out of stealth on 22 July 2026 with $180M; Tel Aviv and Palo Alto. | 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 | How Glow reaches devices is not stated on its homepage; its documentation site could not be read. The Anthropic integration uses one API key and needs Claude Enterprise and the Compliance API. Source: Glow Security: Anthropic integration · Read 13 Oct 2026 | Rolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026 |
| On-device control | Partly describedSoftware control and runtime prevention policies; a pre-execution hook can block an action or hold it for approval. Source: Glow Security blog: AI agents exposed developer screenshots, 29 September 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 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 | PartlyNames Claude Code through a managed-settings bundle in its Anthropic integration. Source: Glow Security: Anthropic integration · 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 | PartlyDescribes a pre-execution hook that can block or hold an action. Source: Glow Security blog: AI agents exposed developer screenshots, 29 September 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 | 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 | PartlyCan hold an action for approval. Source: Glow Security blog: AI agents exposed developer screenshots, 29 September 2026 · 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 pre-execution hook can block an action. Source: Glow Security blog: AI agents exposed developer screenshots, 29 September 2026 · 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 | PartlyCompliance audit trail for Claude through the Anthropic integration. Source: Glow Security: Anthropic integration · Read 13 Oct 2026 | Not in our sources |
| Also covers SaaS, cloud or homegrown AI | PartlyCovers Claude Enterprise accounts, skills and connectors through the Anthropic integration. Source: Glow Security: Anthropic integration · Read 13 Oct 2026 | 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: Glow Security 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?
- Browser extension: Glow is not in our sources; Harmonic describes it.
- AI or MCP gateway: Glow is not in our sources; Harmonic describes it.
- Names the coding agents it covers: Glow partly matches; Harmonic matches.
- Controls what goes into browser AI: Glow is not in our sources; Harmonic matches.
- Rolls out through EDR or device management you run: Glow is not in our sources; Harmonic matches.
- Can warn or ask instead of only blocking: Glow partly matches; Harmonic matches.
- Has a watch-only or simulation mode: Glow is not in our sources; Harmonic matches.
- Records who or what took each action: Glow partly matches; Harmonic is not in our sources.
- Has a public price or tiers (vendor site or marketplace): Glow is not in our sources; Harmonic partly matches.
Choose Glow if
- Your company runs Claude Enterprise and wants per-user usage and an audit trail
- You want software control on the endpoint alongside AI controls
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?
Glow
- How it reaches devices is not stated on the pages we could read.
- No price is published, and the homepage figures are Glow's own statements.
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.