HEAD-TO-HEAD · FACTS ONLY
Ent vs Prompt Security: AI endpoint control facts side by side
Short answer
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: Ent
- 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)
What are the facts, side by side?
| Fact | Ent | 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 intent-aware AI endpoint: one programmable policy for people and AI agents, with interventions from a soft nudge to a hard block, an on-device small language model that classifies sensitive data, and investigation timelines written in plain language. Use cases: insider risk, last-mile threats such as ClickFix, AI usage control and data security. | 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 | A single lightweight agent across Windows, macOS, Linux and modern browsers, run as SaaS or self-hosted in your own cloud; rollout through MDM is not stated. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 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 control | DescribedA single lightweight agent across Windows, macOS and Linux with one programmable policy for people and AI agents. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 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 | DescribedBrowser-extension deployments generally available at launch. Source: Ent press: $100M seed, 16 June 2026 · Read 13 Oct 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 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 covers | MatchesNames OpenAI Codex, Claude Code, Claude Cowork, GitHub Copilot and Cursor. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | MatchesNames GitHub Copilot, Cursor and Claude Code. Source: SentinelOne: Prompt Security · Read 27 Sep 2026 |
| Decides on a tool call before it runsDiffers | PartlyBlocks risky agent behavior where needed; per-tool-call mechanics are not described. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | Not in our sources |
| Controls what goes into browser AIDiffers | PartlyClassifies sensitive data at the point of use on the device and in browsers; prompt-level controls are not detailed. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 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 blockingDiffers | MatchesInterventions range from a soft nudge to a hard block. Source: Ent homepage · Read 13 Oct 2026 | Not in our sources |
| Can block an agent, tool or actionDiffers | MatchesA hard block is one of its interventions. Source: Ent homepage · Read 13 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 actionDiffers | MatchesNatural-language investigation timelines. Source: Ent press: intent-aware prevention for AI agents, 30 July 2026 · Read 13 Oct 2026 | 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 (demo request). Source: Ent homepage · Read 13 Oct 2026 | Not published. Source: SentinelOne: Prompt Security · Read 27 Sep 2026 |
Where do they differ?
- Decides on a tool call before it runs: Ent partly matches; Prompt Security is not in our sources.
- Controls what goes into browser AI: Ent partly matches; Prompt Security matches.
- Rolls out through EDR or device management you run: Ent is not in our sources; Prompt Security partly matches.
- Can warn or ask instead of only blocking: Ent matches; Prompt Security is not in our sources.
- Can block an agent, tool or action: Ent matches; Prompt Security is not in our sources.
- Records who or what took each action: Ent matches; Prompt Security is not in our sources.
- Also covers SaaS, cloud or homegrown AI: Ent is not in our sources; Prompt Security matches.
Choose Ent if
- You want one policy for people and AI agents, with nudges as well as blocks
- You need device and browser coverage from one agent
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?
Ent
- Per-tool-call mechanics and rollout through MDM are not described on the pages we read.
- Uses its own agent, and no price is published.
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.