HEAD TO HEAD
Prompt Security (SentinelOne) matched with Zenity: agentic endpoint security compared
SHORT ANSWER
On our published weights Zenity scores higher overall, 6.75 to 5.45 out of 10. Prompt Security scores higher on rollout path; Zenity scores higher on stop before it runs, capability rules, actor trail, cloud and workspace reach and named agent coverage; they tie on verdict range and public proof. 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?
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
Zenity
Agents across SaaS, cloud and coding tools
Rank 3 of 8 among broader AI security platforms
Which scores higher on each criterion?
| Criterion | Weight | Prompt Security (SentinelOne) | Zenity | Higher |
|---|---|---|---|---|
| Stop before it runs | 25% | 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 | 8 / 10 Blocks or modifies a dangerous coding-agent tool call before it executes, through native agent hooks and the Zenity MCP gateway. Source: Zenity: coding and personal agents · Read 27 Sep 2026 | Zenity |
| Verdict range | 15% | 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 | 3 / 10 Documents 2 of six verdict types: Block or deny and Mask or modify. "Blocks or modifies a dangerous tool call before it executes." Source: Zenity: coding and personal agents · Read 27 Sep 2026 | Tie |
| Capability rules | 15% | 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 | 7 / 10 Monitors what code an agent reads, what commands it runs, what it installs and what it sends out, with Runtime Boundaries at platform level. Source: Zenity: coding and personal agents · Read 27 Sep 2026 | Zenity |
| Actor trail | 10% | 5 / 10 Agent versus person attribution is not described on the pages we read. Source: SentinelOne: Prompt Security, securing AI · Read 27 Sep 2026 | 7 / 10 Agentic identity and access management is a named capability. Source: Zenity platform · Read 27 Sep 2026 | Zenity |
| Rollout path | 10% | 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 | 5 / 10 How the endpoint component reaches laptops is not published on the pages we read. Source: Zenity: coding and personal agents · Read 27 Sep 2026 | Prompt Security |
| Cloud and workspace reach | 10% | 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 | 9 / 10 Covers cloud and homegrown agents and agentic SaaS, with integrations including AWS Bedrock, Azure AI Foundry and Google Vertex AI. Source: Zenity platform · Read 27 Sep 2026 | Zenity |
| Named agent coverage | 5% | 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 | 7 / 10 Names 4 of the six agents we track: Claude Code, Cursor, GitHub Copilot and OpenAI Codex. Source: Zenity: coding and personal agents · Read 27 Sep 2026 | Zenity |
| Public proof | 10% | 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 | 8 / 10 A wide public integrations catalog, a $125 million Series C (3 August 2026) and analyst recognition cited by the vendor; pricing not published. Source: Zenity platform · Read 27 Sep 2026 | Tie |
Which verdicts does each document?
| Verdict type | Prompt Security (SentinelOne) | Zenity |
|---|---|---|
| Block or deny | Documented | Documented |
| Ask a person | Not described | Not described |
| Alert or warn | Not described | Not described |
| Mask or modify | Documented | Documented |
| Simulate first | Not described | Not described |
| Remove or scale back | Not described | Not described |
- 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
- Zenity: "Blocks or modifies a dangerous tool call before it executes."
Source: Zenity: coding and personal agents · Read 27 Sep 2026
How does each reach devices?
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
Zenity
Native agent hooks, OpenTelemetry and the Zenity MCP gateway for local agents; how the endpoint component is installed is not published on the pages we read.
Source: Zenity: coding and personal agents · Read 27 Sep 2026
Which agents does each name?
| Agent | Prompt Security (SentinelOne) | Zenity |
|---|---|---|
| Claude Code | Named | Named |
| Cursor | Named | Named |
| GitHub Copilot | Named | Named |
| OpenAI Codex | Not named | Named |
| Windsurf | Not named | Not named |
| Claude Desktop | Not named | Not named |
| Named | 3 of 6 | 4 of 6 |
Which should you choose?
Choose Prompt Security (SentinelOne) if you need public proof and stop before it runs. Prompt Security (SentinelOne) is best for: SentinelOne Singularity estates.
Choose Zenity if you need cloud and workspace reach and stop before it runs. Zenity is best for: Agents across SaaS, cloud and coding tools.
Frequently asked questions
Which is better for agentic endpoint security, Prompt Security (SentinelOne) or Zenity?
On our published weights Zenity scores higher overall, 6.75 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, Prompt Security (SentinelOne) or Zenity?
Zenity scores higher on stopping an action before it runs (8 to 6). Prompt Security (SentinelOne): Governs what agents and MCP servers can do; per-tool-call enforcement is not detailed. Zenity: Blocks or modifies a dangerous coding-agent tool call before it executes, through native agent hooks and the Zenity MCP gateway.
Do Prompt Security (SentinelOne) and Zenity publish prices?
Prompt Security (SentinelOne): not published. SentinelOne publishes no pricing for Prompt Security. Zenity: not published. Zenity publishes no pricing.