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

Neither is scored on this site. AI Access Security describes 1 of four product control types and Onyx 3 on the pages we read, and they differ on 12 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. Onyx: Matches. Warn or ask: AI Access Security Not in our sources, Onyx Matches.

Do AI Access Security or Onyx publish prices?

AI Access Security: Not published. Onyx: Not published.

HEAD-TO-HEAD · FACTS ONLY

AI Access Security vs Onyx: 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 Onyx describes 3; they differ on on-device control, browser extension, network or SSE proxy and AI or MCP gateway. On decisions, AI Access Security does not describe tool-call decisions on the pages we read and Onyx decides on a tool call before it runs. 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: Onyx, 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 Onyx Security, from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	AI Access Security	Onyx
Owner	None	None
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.	"The Secure AI Control Plane for the Agentic Era": inline inspection of prompts, tool calls and model responses across browser AI, coding assistants, desktop AI agents, cloud workloads and MCP servers. Based in Tel Aviv and New York.
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	Endpoint agents, browser extensions, APIs and gateways. Source: Onyx Security: AI security platform · Read 27 Sep 2026
On-device controlDiffers	Not in our sourcesNot described on the pages we read.	DescribedEndpoint agents cover coding assistants and desktop AI agents. Source: Onyx Security: AI security platform · Read 27 Sep 2026
Browser extensionDiffers	Not in our sourcesNot described on the pages we read.	DescribedBrowser extensions cover browser AI. Source: Onyx Security: AI security platform · Read 27 Sep 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 gatewayDiffers	Not in our sourcesNot described on the pages we read.	DescribedGateways and APIs inspect traffic inline. Source: Onyx Security: AI security platform · Read 27 Sep 2026
Names the coding agents it coversDiffers	Not in our sources	PartlyCovers coding assistants; specific tools are not named on the pages we read. Source: Onyx Security: AI security platform · Read 27 Sep 2026
Decides on a tool call before it runsDiffers	Not in our sources	MatchesInspects every prompt, tool call and model response inline. Source: Onyx Security: AI security platform · Read 27 Sep 2026
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	MatchesCan mask data in browser AI as well as block it. Source: Onyx Security: AI security platform · Read 27 Sep 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	Not in our sources	MatchesFive actions: alert, block, mask, steer or ask. Source: Onyx Security: AI security platform · Read 27 Sep 2026
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	MatchesBlock is one of five actions. Source: Onyx Security: AI security platform · Read 27 Sep 2026
Has a watch-only or simulation modeDiffers	Not in our sources	PartlyAlert is one of five actions; a simulation mode is not described. Source: Onyx Security: AI security platform · Read 27 Sep 2026
Records who or what took each actionDiffers	Not in our sources	PartlyIntegrates with Okta, Entra and Splunk; separating a person from an agent is not described. Source: Onyx Security: AI security platform · Read 27 Sep 2026
Also covers SaaS, cloud or homegrown AIDiffers	Not in our sources	MatchesCloud workloads and MCP servers as well as devices. Source: Onyx Security: AI security platform · 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	None
Works with	Part of Palo Alto Networks' SASE offering, linked from Prisma Access. Source: Palo Alto Networks: AI Access Security · Read 11 Oct 2026	Lists CrowdStrike among its integrations. Source: Onyx Security: AI security platform · Read 27 Sep 2026
Price	Not published. Source: Palo Alto Networks: AI Access Security · Read 11 Oct 2026	Not published. Source: Onyx Security homepage · Read 27 Sep 2026

Where do they differ?

On-device control: AI Access Security is not in our sources; Onyx describes it.
Browser extension: AI Access Security is not in our sources; Onyx describes it.
Network or SSE proxy: AI Access Security describes it; Onyx is not in our sources.
AI or MCP gateway: AI Access Security is not in our sources; Onyx describes it.
Names the coding agents it covers: AI Access Security is not in our sources; Onyx partly matches.
Decides on a tool call before it runs: AI Access Security is not in our sources; Onyx matches.
Controls what goes into browser AI: AI Access Security partly matches; Onyx matches.
Can warn or ask instead of only blocking: AI Access Security is not in our sources; Onyx matches.
Can block an agent, tool or action: AI Access Security partly matches; Onyx matches.
Has a watch-only or simulation mode: AI Access Security is not in our sources; Onyx partly matches.
Records who or what took each action: AI Access Security is not in our sources; Onyx partly matches.
Also covers SaaS, cloud or homegrown AI: AI Access Security is not in our sources; Onyx 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 Onyx if

You want masking or steering rather than only allow or block
AI use spans the browser, desktop apps, coding tools and cloud workloads

Which limits should you check?