Head to head · Checked against vendor sites, September 2026
Zenity vs Prompt Security (SentinelOne): AI agent security compared
The verdict
Zenity scores higher overall on our weights (7.4 vs 6.6 out of 10). Zenity scores higher on visibility, tool-call control, identity and audit and breadth; Prompt Security scores higher on footprint. They tie on policy and maturity. Neither publishes list prices.
Prompt Security (SentinelOne)
Owner: SentinelOne (acquisition announced 5 August 2025)
Best for SentinelOne customers
How do Zenity and Prompt Security compare on each criterion?
| Criterion | Weight | Zenity | Prompt Security | Edge |
|---|---|---|---|---|
| Visibility | 22% | 8 | 7 | Zenity |
Why these scoresZenity: Discovers coding and personal agents on laptops and desktops and the MCP servers, tools and data they connect to. Prompt Security: Inventories AI tools and code assistants, including shadow AI, and maps agents and MCP servers. | ||||
| Tool-call control | 20% | 8 | 6 | Zenity |
Why these scoresZenity: Blocks or modifies a dangerous tool call before it executes through native agent hooks and the Zenity MCP gateway. Prompt Security: Governs what agents and MCP servers can do; per-tool-call enforcement is not detailed. | ||||
| Policy | 15% | 7 | 7 | Tie |
Why these scoresZenity: Runtime Boundaries and AISPM; context-based rules described at platform level. Prompt Security: Prevents prompt injection and data leakage for tools such as GitHub Copilot, Cursor and Claude Code. | ||||
| Identity and audit | 12% | 7 | 5 | Zenity |
Why these scoresZenity: Agentic identity and access management is a named capability. Prompt Security: Agent vs human attribution not described on the pages we reviewed. | ||||
| Footprint | 13% | 5 | 6 | Prompt Security |
Why these scoresZenity: Endpoint deployment method is not published on the pages we reviewed. Prompt Security: Built into the SentinelOne Singularity Platform; the deployment method is not detailed. | ||||
| Breadth | 8% | 9 | 8 | Zenity |
Why these scoresZenity: Agentic SaaS, cloud and homegrown agents with a long integrations list, including Microsoft 365 Copilot, Copilot Studio, Salesforce Agentforce and ServiceNow. Prompt Security: Employees, developers and homegrown AI apps from testing to runtime. | ||||
| Maturity | 10% | 8 | 8 | Tie |
Why these scoresZenity: Established agent security vendor with a wide public integrations catalog and analyst mentions cited by the vendor; pricing not published. Prompt Security: Backed by SentinelOne, which announced the acquisition on 5 August 2025; pricing not published. | ||||
| Total | 100% | 7.4 | 6.6 | Zenity |
How do they deploy, and what do they cost?
| Attribute | Zenity | Prompt Security |
|---|---|---|
| Owner | Not acquired | SentinelOne (acquisition announced 5 August 2025) |
| How it reaches devices | Agent hooks and MCP gateway; method not published | Part of Singularity Platform; method not published |
| Deployment detail | Zenity describes "lightweight monitoring, detection, and response" for local agents, using native agent hooks, OpenTelemetry and its MCP gateway. The pages we reviewed do not say whether the endpoint component installs its own agent or deploys through EDR or MDM. SaaS coverage connects to the platforms listed above. | SentinelOne says Prompt Security deploys in minutes and is part of the Singularity Platform that protects endpoints, cloud, identity and data. The specific deployment method (browser extension, endpoint agent, IDE extension or proxy) is not detailed on the page we reviewed. |
| Pricing | Contact sales. Zenity does not publish pricing. | Contact sales. Pricing is not published. |
Source: zenity.io · Zenity platform · Zenity coding and personal agents · SentinelOne Prompt Security page · SentinelOne press release, 5 August 2025 · prompt.security · Reviewed Sep 2026
Which should you choose?
Choose Zenity if
- Your priority matches our designation for Zenity: best for SaaS and Microsoft agent estates.
- You need to evaluate or stop individual tool calls before they run: Zenity scores 8 to 6.
- You need an audit record that separates agent actions from human actions: Zenity scores 7 to 5.
Choose Prompt Security if
- Your priority matches our designation for Prompt Security: best for SentinelOne customers.
- You want a light rollout with published deployment detail, ideally through existing EDR or MDM: Prompt Security scores 6 to 5.
Frequently asked questions
Which is better, Zenity or Prompt Security (SentinelOne)?
Zenity scores higher overall on our weights (7.4 vs 6.6 out of 10). Zenity scores higher on visibility, tool-call control, identity and audit and breadth; Prompt Security scores higher on footprint. They tie on policy and maturity. Scores are editorial assessments from public vendor material, reviewed September 2026.
Do Zenity and Prompt Security (SentinelOne) publish prices?
No. Neither publishes list prices, so ask both for a quote.
Do Zenity or Prompt Security (SentinelOne) replace EDR?
No. The tools in this guide add control over AI agent actions and work alongside EDR. Zenity: Agent hooks and MCP gateway; method not published. Prompt Security: Part of Singularity Platform; method not published.
Related
Sources
- zenity.io · Reviewed Sep 2026
- Zenity platform · Reviewed Sep 2026
- Zenity coding and personal agents · Reviewed Sep 2026
- SentinelOne Prompt Security page · Reviewed Sep 2026
- SentinelOne press release, 5 August 2025 · Reviewed Sep 2026
- prompt.security · Reviewed Sep 2026