Is AI Access Security or Prompt Security better for AI endpoint control?

Neither is scored on this site. AI Access Security describes 1 of four product control types and Prompt Security 2 on the pages we read, and they differ on 8 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?

AI Access Security: Not in our sources. Prompt Security: Not in our sources. Warn or ask: AI Access Security Not in our sources, Prompt Security Not in our sources.

Do AI Access Security or Prompt Security publish prices?

AI Access Security: Not published. Prompt Security: Not published.

HEAD-TO-HEAD · FACTS ONLY

AI Access Security vs Prompt Security: AI endpoint control facts side by side

Short answer

AI Access Security describes 1 of the four product control types on the pages we read and Prompt Security describes 2; they differ on on-device control, browser extension and network or SSE proxy. On decisions, AI Access Security does not describe tool-call decisions on the pages we read and Prompt Security 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: AI Access Security
Dashed teal ring: Prompt Security, 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?

AI Access Security (Palo Alto Networks) and Prompt Security (SentinelOne), from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	AI Access Security	Prompt Security
Owner	None	SentinelOne (acquisition announced 5 August 2025; SentinelOne's blog of 3 September 2025 is titled SentinelOne Acquires Prompt Security)
Positioning	Palo Alto Networks' control for employee use of GenAI apps, linked from its Prisma Access and SASE pages: visibility into shadow AI across 4,000+ GenAI applications, control over their use, and protection against sensitive data loss and malicious responses.	Prompt Security, now part of SentinelOne, inventories AI tools and code assistants, including unsanctioned shadow AI, through two local sensors, a browser extension and a dedicated AI endpoint agent, and is built into the SentinelOne Singularity Platform.
How it reaches devices	Part of Palo Alto Networks' SASE offering, linked from Prisma Access; the page does not describe an endpoint component. Source: Palo Alto Networks: AI Access Security · Read 11 Oct 2026	Two local sensors: a browser extension and a dedicated AI endpoint agent, managed from the SentinelOne Singularity Platform. Prompt Security argues that MDM or EDR integrations, which mostly run scripts periodically, are not enough. Source: Prompt Security blog: browser and endpoint sensors · Read 11 Oct 2026
On-device controlDiffers	Not in our sourcesNot described on the pages we read.	DescribedA dedicated AI endpoint agent detects new AI agents, skills and connectors and applies runtime policies; it names GitHub Copilot, Cursor and Claude Code among the code assistants it inventories. Source: Prompt Security blog: browser and endpoint sensors · Read 11 Oct 2026
Browser extensionDiffers	Not in our sourcesNot described on the pages we read.	DescribedA browser extension inspects prompts, redacts sensitive data and discovers shadow AI. Source: Prompt Security blog: browser and endpoint sensors · Read 11 Oct 2026
Network or SSE proxyDiffers	DescribedVisibility into shadow AI across 4,000+ GenAI applications, control, and protection against sensitive data loss, delivered with Palo Alto Networks' SASE. Source: Palo Alto Networks: AI Access Security · Read 11 Oct 2026	Not in our sourcesNot described on the pages we read.
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	Not in our sources	MatchesNames GitHub Copilot, Cursor and Claude Code. Source: SentinelOne: Prompt Security · Read 27 Sep 2026
Decides on a tool call before it runs	Not in our sources	Not in our sources
Controls what goes into browser AIDiffers	PartlyPrevents sensitive data loss in GenAI apps; prompt-level controls are not detailed on the page. Source: Palo Alto Networks: AI Access Security · Read 11 Oct 2026	MatchesThe browser extension inspects prompts and redacts sensitive data. Source: Prompt Security blog: browser and endpoint sensors · Read 11 Oct 2026
Rolls out through EDR or device management you runDiffers	Not in our sources	PartlyIts own agent and extension, managed in the SentinelOne console; it does not ride on other EDR or MDM tools. Source: Prompt Security blog: browser and endpoint sensors · Read 11 Oct 2026
Can warn or ask instead of only blocking	Not in our sources	Not in our sources
Can block an agent, tool or actionDiffers	PartlyControl over GenAI app use is listed; the actions available are not detailed. Source: Palo Alto Networks: AI Access Security · Read 11 Oct 2026	Not in our sources
Has a watch-only or simulation mode	Not in our sources	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	Not in our sources	MatchesCovers homegrown AI apps from testing to runtime. Source: SentinelOne: Prompt Security · Read 27 Sep 2026
Has a public price or tiers (vendor site or marketplace)	Not in our sources	Not in our sources
Built into	None	Built into the SentinelOne Singularity Platform. Source: SentinelOne: Prompt Security · Read 27 Sep 2026
Works with	Part of Palo Alto Networks' SASE offering, linked from Prisma Access. Source: Palo Alto Networks: AI Access Security · Read 11 Oct 2026	None in our sources
Price	Not published. Source: Palo Alto Networks: AI Access Security · Read 11 Oct 2026	Not published. Source: SentinelOne: Prompt Security · Read 27 Sep 2026

Where do they differ?

On-device control: AI Access Security is not in our sources; Prompt Security describes it.
Browser extension: AI Access Security is not in our sources; Prompt Security describes it.
Network or SSE proxy: AI Access Security describes it; Prompt Security is not in our sources.
Names the coding agents it covers: AI Access Security is not in our sources; Prompt Security matches.
Controls what goes into browser AI: AI Access Security partly matches; Prompt Security matches.
Rolls out through EDR or device management you run: AI Access Security is not in our sources; Prompt Security partly matches.
Can block an agent, tool or action: AI Access Security partly matches; Prompt Security is not in our sources.
Also covers SaaS, cloud or homegrown AI: AI Access Security is not in our sources; Prompt Security matches.

Choose AI Access Security if

You already run Palo Alto Networks Prisma Access and want GenAI app controls in the same place
Your main concern is employees using many GenAI web apps rather than agents on laptops

Choose Prompt Security if

You already run SentinelOne Singularity
You need an inventory of AI tools and coding assistants first

Which limits should you check?