Is Glow or Zscaler better for AI endpoint control?

Neither is scored on this site. Glow describes 0 of four product control types and Zscaler 1 on the pages we read, and they differ on 7 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?

Glow: Partly. Zscaler: Not in our sources. Warn or ask: Glow Partly, Zscaler Not in our sources.

Do Glow or Zscaler publish prices?

Glow: Not published (demo request). Zscaler: Not published (demo request).

HEAD-TO-HEAD · FACTS ONLY

Glow vs Zscaler: AI endpoint control facts side by side

Short answer

Glow describes 0 of the four product control types on the pages we read and Zscaler describes 1; they differ on on-device control and network or SSE proxy. On decisions, Glow describes some control over tool calls and Zscaler does not describe tool-call decisions on the pages we read. 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: Glow
Dashed teal ring: Zscaler, 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?

Glow Security and Zscaler Generative AI Security, from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	Glow	Zscaler
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.	Zscaler's controls for employee use of generative AI: prompt-level visibility, allow or block by app, DLP blocking across GenAI apps, browser isolation that disables cut, paste and download, and data security for Microsoft Copilot.
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	Delivered with Zscaler's cloud security service in the network path; endpoint agents are not described on the page we read. Source: Zscaler: Secure the use of generative AI · Read 11 Oct 2026
On-device controlDiffers	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	Not in our sourcesNot described on the pages we read.
Browser extension	Not in our sourcesNot described on the pages we read.	Not in our sourcesNot described on the pages we read.
Network or SSE proxyDiffers	Not in our sourcesNot described on the pages we read.	DescribedSee all input prompts users send to apps, allow or block apps, block sensitive data with DLP across GenAI, and isolate the browser to disable cut, paste and download. Source: Zscaler: Secure the use of generative AI · Read 11 Oct 2026
AI or MCP gateway	Not in our sourcesNot described on the pages we read.	Not in our sourcesNot described on the pages we read.
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	Not in our sources
Decides on a tool call before it runsDiffers	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	Not in our sources
Controls what goes into browser AIDiffers	Not in our sources	MatchesPrompt-level visibility, DLP blocking across GenAI apps, and browser isolation that disables cut, paste and download. Source: Zscaler: Secure the use of generative AI · Read 11 Oct 2026
Rolls out through EDR or device management you run	Not in our sources	Not in our sources
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	Not in our sources
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	MatchesAllow or block GenAI apps, and block sensitive data with DLP. Source: Zscaler: Secure the use of generative AI · Read 11 Oct 2026
Has a watch-only or simulation mode	Not in our sources	Not in our sources
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	PartlyData security for Microsoft Copilot, including misconfigurations. Source: Zscaler: Secure the use of generative AI · Read 11 Oct 2026
Has a public price or tiers (vendor site or marketplace)	Not in our sources	Not in our sources
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	Not published (demo request). Source: Zscaler: Secure the use of generative AI · Read 11 Oct 2026

Where do they differ?

On-device control: Glow partly describes it; Zscaler is not in our sources.
Network or SSE proxy: Glow is not in our sources; Zscaler describes it.
Names the coding agents it covers: Glow partly matches; Zscaler is not in our sources.
Decides on a tool call before it runs: Glow partly matches; Zscaler is not in our sources.
Controls what goes into browser AI: Glow is not in our sources; Zscaler matches.
Can warn or ask instead of only blocking: Glow partly matches; Zscaler is not in our sources.
Records who or what took each action: Glow partly matches; Zscaler is not in our sources.

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 Zscaler if

You already route traffic through Zscaler and want GenAI controls there
Your main risk is sensitive data pasted or uploaded into GenAI web apps

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.

Zscaler

Coding agents, MCP servers and local agent actions are not described on the page we read.
Warn or ask responses are not described, and no pricing is published.

Line up Glow and Zscaler with others Run the finder