Is Bloom or Prompt Security better for AI endpoint control?

Neither is scored on this site. Bloom describes 0 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?

Bloom: Partly. Prompt Security: Not in our sources. Warn or ask: Bloom Not in our sources, Prompt Security Not in our sources.

Do Bloom or Prompt Security publish prices?

Bloom: Not published. Prompt Security: Not published.

HEAD-TO-HEAD · FACTS ONLY

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

Short answer

Bloom describes 0 of the four product control types on the pages we read and Prompt Security describes 2; they differ on on-device control and browser extension. On decisions, Bloom describes some control over tool calls 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: Bloom
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?

Bloom Security and Prompt Security (SentinelOne), from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	Bloom	Prompt Security
Owner	None	SentinelOne (acquisition announced 5 August 2025; SentinelOne's blog of 3 September 2025 is titled SentinelOne Acquires Prompt Security)
Positioning	An endpoint security company built around "Securing the AI-Native Endpoint": discovery of the software, extensions and AI tools running on devices, with policy enforcement across package and extension marketplaces. Offices in Wilmington, Delaware and Tel Aviv.	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	Deployment method not published on the pages we read (re-checked 11 October 2026). Source: Bloom Security homepage · Read 27 Sep 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	Partly describedDiscovers software, extensions and AI on the endpoint and automatically scales back overpermissioned MCP servers; how it reaches the device is not published. Source: Bloom Security homepage · Read 27 Sep 2026	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 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	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 runsDiffers	PartlyAutomatically scales back overpermissioned MCP servers; decisions on individual calls are not described. Source: Bloom Security homepage · Read 27 Sep 2026	Not in our sources
Controls what goes into browser AIDiffers	Not in our sources	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	PartlyEnforces policies across npm, Chrome Web Store and Open VSX. Source: Bloom Security homepage · Read 27 Sep 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	None in our sources	None in our sources
Price	Not published. Source: Bloom Security homepage · Read 27 Sep 2026	Not published. Source: SentinelOne: Prompt Security · Read 27 Sep 2026

Where do they differ?

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

Choose Bloom if

Your first worry is unvetted extensions and packages arriving on developer machines
You want an inventory of everything on the endpoint before you write AI-specific rules

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?

Bloom

Deployment method and pricing are not published.
Decisions on individual tool calls and an activity record are not described on the pages we read.
Limited company information on its own pages: they do not name investors; funding is known from press coverage (Ctech, 30 July 2026).

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.

Line up Bloom and Prompt Security with others Run the finder