Is Prompt Security or Sun better for AI endpoint control?

Neither is scored on this site. Prompt Security describes 2 of four product control types and Sun 0 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?

Prompt Security: Not in our sources. Sun: Matches. Warn or ask: Prompt Security Not in our sources, Sun Not in our sources.

Do Prompt Security or Sun publish prices?

Prompt Security: Not published. Sun: Not published (demo request).

HEAD-TO-HEAD · FACTS ONLY

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

Short answer

Prompt Security describes 2 of the four product control types on the pages we read and Sun describes 0; they differ on on-device control and browser extension. On decisions, Prompt Security does not describe tool-call decisions on the pages we read and Sun 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: Prompt Security
Dashed teal ring: Sun, 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?

Prompt Security (SentinelOne) and Sun Security, from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	Prompt Security	Sun
Owner	SentinelOne (acquisition announced 5 August 2025; SentinelOne's blog of 3 September 2025 is titled SentinelOne Acquires Prompt Security)	None
Positioning	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.	AI agent security that says it sits in the path of every AI agent across workstations, cloud and SaaS, with three capabilities: discovery, posture management that learns each agent's purpose, and runtime checks of every tool call, connection and resource draw against that purpose before it executes.
How it reaches devices	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	Not described; the site says you can get started in 5 minutes. Source: Sun Security homepage · Read 13 Oct 2026
On-device controlDiffers	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	Partly describedCovers agents on workstations; the on-device method is not described. Source: Sun Security homepage · Read 13 Oct 2026
Browser extensionDiffers	DescribedA browser extension inspects prompts, redacts sensitive data and discovers shadow AI. Source: Prompt Security blog: browser and endpoint sensors · Read 11 Oct 2026	Not in our sourcesNot described on the pages we read.
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 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	MatchesNames GitHub Copilot, Cursor and Claude Code. Source: SentinelOne: Prompt Security · Read 27 Sep 2026	PartlyNames Cursor and Claude Cowork; Claude Code, Codex and GitHub Copilot are not named. Source: Sun Security homepage · Read 13 Oct 2026
Decides on a tool call before it runsDiffers	Not in our sources	MatchesEvery tool call, connection and resource draw is checked against the agent's purpose before it executes. Source: Sun Security homepage · Read 13 Oct 2026
Controls what goes into browser AIDiffers	MatchesThe browser extension inspects prompts and redacts sensitive data. Source: Prompt Security blog: browser and endpoint sensors · Read 11 Oct 2026	Not in our sources
Rolls out through EDR or device management you runDiffers	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	Not in our sources
Can warn or ask instead of only blocking	Not in our sources	Not in our sources
Can block an agent, tool or actionDiffers	Not in our sources	PartlyIts demo shows a stopped action. Source: Sun Security homepage · Read 13 Oct 2026
Has a watch-only or simulation mode	Not in our sources	Not in our sources
Records who or what took each actionDiffers	Not in our sources	PartlyIts demo shows an action log. Source: Sun Security homepage · Read 13 Oct 2026
Also covers SaaS, cloud or homegrown AI	MatchesCovers homegrown AI apps from testing to runtime. Source: SentinelOne: Prompt Security · Read 27 Sep 2026	MatchesNames Copilot Studio and AWS Bedrock agents. Source: Sun Security homepage · Read 13 Oct 2026
Has a public price or tiers (vendor site or marketplace)	Not in our sources	Not in our sources
Built into	Built into the SentinelOne Singularity Platform. Source: SentinelOne: Prompt Security · Read 27 Sep 2026	None
Works with	None in our sources	None in our sources
Price	Not published. Source: SentinelOne: Prompt Security · Read 27 Sep 2026	Not published (demo request). Source: Sun Security homepage · Read 13 Oct 2026

Where do they differ?

On-device control: Prompt Security describes it; Sun partly describes it.
Browser extension: Prompt Security describes it; Sun is not in our sources.
Names the coding agents it covers: Prompt Security matches; Sun partly matches.
Decides on a tool call before it runs: Prompt Security is not in our sources; Sun matches.
Controls what goes into browser AI: Prompt Security matches; Sun is not in our sources.
Rolls out through EDR or device management you run: Prompt Security partly matches; Sun is not in our sources.
Can block an agent, tool or action: Prompt Security is not in our sources; Sun partly matches.
Records who or what took each action: Prompt Security is not in our sources; Sun partly matches.

Choose Prompt Security if

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

Choose Sun if

You want each agent action checked against that agent's purpose

Which limits should you check?

Prompt Security

Two new local sensors to roll out, a browser extension and an endpoint agent, unless you already run SentinelOne.
Tool-call decisions, blocking, warning and activity records for agent actions are not described on the pages we read, and no pricing is published.

Sun

Sun's site is a single marketing page, so most details are not described.
How it reaches devices is not described, and no price is published.

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