Is Lasso or Prompt Security better for AI endpoint control?

Neither is scored on this site. Lasso describes 3 of four product control types and Prompt Security 2 on the pages we read, and they differ on 9 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?

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

Do Lasso or Prompt Security publish prices?

Lasso: Marketplace list price: Lasso for Employees, annual commit for GenAI chatbots, $20,000 for 12 months on AWS Marketplace. Other products: not published. Prompt Security: Not published.

HEAD-TO-HEAD · FACTS ONLY

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

Short answer

Lasso describes 3 of the four product control types on the pages we read and Prompt Security describes 2; they differ on on-device control, network or SSE proxy and AI or MCP gateway. On decisions, Lasso decides on a tool call before it runs 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: Lasso
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?

Lasso Security and Prompt Security (SentinelOne), from each product's own pages. Differs is computed from recorded statuses, not wording.
Fact	Lasso	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 AI security platform with discovery and an AI-BOM, posture management, automated red teaming and runtime enforcement at the proxy, API or AI gateway layer, plus usage control through a browser extension and an open-source MCP gateway.	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	Several components: a browser extension and proxy integrations for usage control, an open-source MCP gateway, and Claude Code lifecycle hooks set through the enterprise management platform. Source: Lasso Security: AI usage control · 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 describedConnects directly to Claude Code's lifecycle hooks via the enterprise management platform and inspects every tool call before it runs; a resident device agent is not described. Source: Lasso Security: AI coding assistants · 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 extension	DescribedAI usage control through a browser extension. Source: Lasso Security: AI usage control · Read 27 Sep 2026	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	DescribedProxy integrations for AI usage control; the page says it works with Palo Alto Networks or CrowdStrike. Source: Lasso Security: AI usage control · Read 27 Sep 2026	Not in our sourcesNot described on the pages we read.
AI or MCP gatewayDiffers	DescribedAn open-source MCP gateway that discovers MCP servers across Claude, Cursor and Windsurf and can block, alert or sanitize. Source: Lasso Security: MCP security · Read 27 Sep 2026	Not in our sourcesNot described on the pages we read.
Names the coding agents it covers	MatchesClaude Code lifecycle hooks, and MCP discovery across Claude, Cursor and Windsurf. Source: Lasso Security: AI coding assistants · Read 27 Sep 2026	MatchesNames GitHub Copilot, Cursor and Claude Code. Source: SentinelOne: Prompt Security · Read 27 Sep 2026
Decides on a tool call before it runsDiffers	MatchesInspects every Claude Code tool call before it is executed. Source: Lasso Security: AI coding assistants · Read 27 Sep 2026	Not in our sources
Controls what goes into browser AI	MatchesUsage control through a browser extension. Source: Lasso Security: AI usage control · Read 27 Sep 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 run	PartlyClaude Code hooks are set through the enterprise management platform; the other components are a browser extension, a proxy and a gateway. Source: Lasso Security: AI coding assistants · Read 27 Sep 2026	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 blockingDiffers	PartlyAlert is an action; asking the user is not described. Source: Lasso Security: MCP security · Read 27 Sep 2026	Not in our sources
Can block an agent, tool or actionDiffers	MatchesBlock, alert or sanitize on MCP traffic. Source: Lasso Security: MCP security · Read 27 Sep 2026	Not in our sources
Has a watch-only or simulation modeDiffers	PartlyAlert without blocking. Source: Lasso Security: MCP security · Read 27 Sep 2026	Not in our sources
Records who or what took each actionDiffers	PartlyAudit-ready reports. Source: Lasso Security: AI usage control · Read 27 Sep 2026	Not in our sources
Also covers SaaS, cloud or homegrown AI	MatchesDiscovery and AI-BOM, posture management, red teaming and runtime enforcement for AI apps. Source: Lasso Security homepage · Read 27 Sep 2026	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)Differs	PartlyAWS Marketplace lists Lasso for Employees with an annual commit for GenAI chatbots at $20,000 for 12 months (marketplace list price); prices for its other products are not listed there. Source: AWS Marketplace: Lasso for Employees · Read 11 Oct 2026	Not in our sources
Built into	None	Built into the SentinelOne Singularity Platform. Source: SentinelOne: Prompt Security · Read 27 Sep 2026
Works with	The usage control page says it works with Palo Alto Networks. The usage control page says it works with CrowdStrike. Offers proxy integrations for AI usage control. Source: Lasso Security: AI usage control · Read 27 Sep 2026	None in our sources
Price	Marketplace list price: Lasso for Employees, annual commit for GenAI chatbots, $20,000 for 12 months on AWS Marketplace. Other products: not published. Source: AWS Marketplace: Lasso for Employees · Read 11 Oct 2026	Not published. Source: SentinelOne: Prompt Security · Read 27 Sep 2026

Where do they differ?

On-device control: Lasso partly describes it; Prompt Security describes it.
Network or SSE proxy: Lasso describes it; Prompt Security is not in our sources.
AI or MCP gateway: Lasso describes it; Prompt Security is not in our sources.
Decides on a tool call before it runs: Lasso matches; Prompt Security is not in our sources.
Can warn or ask instead of only blocking: Lasso partly matches; Prompt Security is not in our sources.
Can block an agent, tool or action: Lasso matches; Prompt Security is not in our sources.
Has a watch-only or simulation mode: Lasso partly matches; Prompt Security is not in our sources.
Records who or what took each action: Lasso partly matches; Prompt Security is not in our sources.
Has a public price or tiers (vendor site or marketplace): Lasso partly matches; Prompt Security is not in our sources.

Choose Lasso if

You want controls in several places at once: browser, proxy, MCP gateway and coding agent hooks
You prefer an open-source MCP gateway you can inspect

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?

Lasso

Several components to deploy and run.
Asking the user before an action is not described, and the only public price covers its chatbot product on AWS Marketplace.

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 Lasso and Prompt Security with others Run the finder