HEAD TO HEAD
Ent matched with Prompt Security (SentinelOne): agentic endpoint security compared
SHORT ANSWER
On our published weights Ent scores higher overall, 5.80 to 5.45 out of 10. Ent scores higher on stop before it runs, capability rules, actor trail and named agent coverage; Prompt Security scores higher on cloud and workspace reach and public proof; they tie on verdict range and rollout path. Which fits depends on which of those criteria matters most to you.
By The Agent Desk · Agentic Endpoint Compare · Published 2026-10-11
Desk research from public vendor pages, press releases and standards pages read on 27 September and 11 October 2026. Editorial assessment; we did not run the products.
How do they compare at a glance?
Ent
One intent-aware policy for people and agents
Rank 4 of 6 among agentic endpoint vendors
Prompt Security (SentinelOne)
SentinelOne (deal announced 5 August 2025; completion reported in September 2025)
SentinelOne Singularity estates
Rank 8 of 8 among broader AI security platforms
Which scores higher on each criterion?
| Criterion | Weight | Ent | Prompt Security (SentinelOne) | Higher |
|---|---|---|---|---|
| Stop before it runs | 25% | 7 / 10 Steps in at the moment of risk and blocks risky agent behavior; per-tool-call mechanics are not described. Source: Ent press release: intent-aware prevention for AI agents (30 July 2026) · Read 13 Oct 2026 | 6 / 10 Governs what agents and MCP servers can do; per-tool-call enforcement is not detailed. Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026 | Ent |
| Verdict range | 15% | 3 / 10 Documents 2 of six verdict types: Block or deny and Alert or warn. "Customized actions from a soft nudge to a hard block." Source: Ent homepage · Read 13 Oct 2026 Source: Ent press release: intent-aware prevention for AI agents (30 July 2026) · Read 13 Oct 2026 | 3 / 10 Documents 2 of six verdict types: Block or deny and Mask or modify. "Prevents prompt injection and data leakage; its browser extension inspects and redacts prompts." Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026 Source: Prompt Security blog: browser and endpoint sensors (updated 16 August 2026) · Read 11 Oct 2026 | Tie |
| Capability rules | 15% | 7 / 10 One programmable policy for people and AI agents (SACR names the language EntLang), and app control that can allow, block, deny or restrict usage. Source: Ent press release: intent-aware prevention for AI agents (30 July 2026) · Read 13 Oct 2026 | 5 / 10 Maps agents and MCP servers and finds shadow MCP servers; capability rules are not itemized. Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026 | Ent |
| Actor trail | 10% | 7 / 10 Natural-language investigation timelines built as events happen; the same policy covers people and agents. Source: Ent press release: intent-aware prevention for AI agents (30 July 2026) · Read 13 Oct 2026 | 5 / 10 Agent versus person attribution is not described on the pages we read. Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026 | Ent |
| Rollout path | 10% | 6 / 10 A single lightweight agent across Windows, macOS, Linux and modern browsers, SaaS or self-hosted; rollout through MDM is not stated. Source: Ent press release: intent-aware prevention for AI agents (30 July 2026) · Read 13 Oct 2026 | 6 / 10 Two resident sensors, a browser extension and a dedicated AI endpoint agent, inside the SentinelOne Singularity Platform. Source: Prompt Security blog: browser and endpoint sensors (updated 16 August 2026) · Read 11 Oct 2026 | Tie |
| Cloud and workspace reach | 10% | 3 / 10 Endpoint and browser; agents in cloud workspaces, cloud workloads or SaaS platforms are not described. Source: Ent homepage · Read 13 Oct 2026 | 6 / 10 Covers homegrown AI apps from testing to runtime as well as employee and developer AI use. Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026 | Prompt Security |
| Named agent coverage | 5% | 7 / 10 Names 4 of the six agents we track: Claude Code, Cursor, GitHub Copilot and OpenAI Codex. Source: Ent press release: intent-aware prevention for AI agents (30 July 2026) · Read 13 Oct 2026 | 5 / 10 Names 3 of the six agents we track: Claude Code, Cursor and GitHub Copilot. Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026 | Ent |
| Public proof | 10% | 6 / 10 Came out of stealth on 16 June 2026 with a $100 million seed led by Decibel, generally available on Windows, macOS, Linux and browser extensions; no pricing. Source: Ent press release: $100M seed (16 June 2026) · Read 13 Oct 2026 | 8 / 10 Backed by SentinelOne, which announced the acquisition on 5 August 2025; pricing not published. Source: SentinelOne press release: agreement to acquire Prompt Security (5 August 2025) · Read 27 Sep 2026 | Prompt Security |
Which verdicts does each document?
| Verdict type | Ent | Prompt Security (SentinelOne) |
|---|---|---|
| Block or deny | Documented | Documented |
| Ask a person | Not described | Not described |
| Alert or warn | Documented | Not described |
| Mask or modify | Not described | Documented |
| Simulate first | Not described | Not described |
| Remove or scale back | Not described | Not described |
- Ent: "Customized actions from a soft nudge to a hard block."
Source: Ent homepage · Read 13 Oct 2026
Source: Ent press release: intent-aware prevention for AI agents (30 July 2026) · Read 13 Oct 2026
- Prompt Security (SentinelOne): "Prevents prompt injection and data leakage; its browser extension inspects and redacts prompts."
Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026
Source: Prompt Security blog: browser and endpoint sensors (updated 16 August 2026) · Read 11 Oct 2026
How does each reach devices?
Ent
A single lightweight agent across Windows, macOS, Linux and modern browsers, offered as SaaS or self-hosted; rollout through MDM is not stated.
Source: Ent press release: intent-aware prevention for AI agents (30 July 2026) · Read 13 Oct 2026
Prompt Security (SentinelOne)
Two local sensors, a browser extension and a dedicated AI endpoint agent, built into the SentinelOne Singularity Platform.
Source: Prompt Security blog: browser and endpoint sensors (updated 16 August 2026) · Read 11 Oct 2026
Which agents does each name?
| Agent | Ent | Prompt Security (SentinelOne) |
|---|---|---|
| Claude Code | Named | Named |
| Cursor | Named | Named |
| GitHub Copilot | Named | Named |
| OpenAI Codex | Named | Not named |
| Windsurf | Not named | Not named |
| Claude Desktop | Not named | Not named |
| Named | 4 of 6 | 3 of 6 |
Which should you choose?
Choose Ent if you need stop before it runs and capability rules. Ent is best for: One intent-aware policy for people and agents.
Choose Prompt Security (SentinelOne) if you need public proof and stop before it runs. Prompt Security (SentinelOne) is best for: SentinelOne Singularity estates.
Frequently asked questions
Which is better for agentic endpoint security, Ent or Prompt Security (SentinelOne)?
On our published weights Ent scores higher overall, 5.80 to 5.45 out of 10. See the criterion table above for where each scores higher.
Which stops an agent action before it runs more fully, Ent or Prompt Security (SentinelOne)?
Ent scores higher on stopping an action before it runs (7 to 6). Ent: Steps in at the moment of risk and blocks risky agent behavior; per-tool-call mechanics are not described. Prompt Security (SentinelOne): Governs what agents and MCP servers can do; per-tool-call enforcement is not detailed.
Do Ent and Prompt Security (SentinelOne) publish prices?
Ent: not published. Ent publishes no pricing. Prompt Security (SentinelOne): not published. SentinelOne publishes no pricing for Prompt Security.