HEAD TO HEAD
Bay matched with Prompt Security (SentinelOne): agentic endpoint security compared
SHORT ANSWER
On our published weights Bay scores higher overall, 7.20 to 5.45 out of 10. Bay scores higher on stop before it runs, verdict range, capability rules, actor trail and rollout path; Prompt Security scores higher on cloud and workspace reach and public proof; they tie on named agent coverage. 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?
Bay
Pre-execution control on employee devices, rolled out through EDR or MDM
Rank 1 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 | Bay | Prompt Security (SentinelOne) | Higher |
|---|---|---|---|---|
| Stop before it runs | 25% | 9 / 10 Evaluates prompts, pre-tool calls and post-tool responses on supported agent surfaces and returns Allow, Ask or Deny locally, stated as under 4ms (vendor-stated). Source: Bay blog: Ghostjacking (August 2026) · Read 27 Sep 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 | Bay |
| Verdict range | 15% | 7 / 10 Documents 4 of six verdict types: Block or deny, Ask a person, Simulate first and Remove or scale back. "Returns Allow, Ask or Deny; new rules can run in Simulation Mode first; MCP Control removes disallowed MCP servers in Enforcement mode." Source: Bay blog: Ghostjacking (re-read 11 October 2026) · Read 11 Oct 2026 Source: Bay homepage · Read 27 Sep 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 | Bay |
| Capability rules | 15% | 9 / 10 Capability rules for shell and code execution, process spawning, package installation, cloud CLIs, containers, Kubernetes, browser automation and system changes, plus managed settings for Claude Code, Codex and Claude Desktop. Source: Bay blog: Ghostjacking (August 2026) · Read 27 Sep 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 | Bay |
| Actor trail | 10% | 8 / 10 Records who triggered an action, whether a human was involved, and the complete chain from prompt to system action. Source: Bay homepage · Read 27 Sep 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 | Bay |
| Rollout path | 10% | 9 / 10 Deploys through existing EDR or MDM as an ephemeral binary that runs and exits; described as agentless by design. Source: Bay blog: Ghostjacking (August 2026) · Read 27 Sep 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 | Bay |
| Cloud and workspace reach | 10% | 3 / 10 Described as endpoint security for enterprise endpoints; its rules govern cloud CLIs, containers and Kubernetes called from the device, but bay.io, re-read on 11 October 2026, does not describe coverage for agents running in cloud workspaces or cloud-hosted apps. Source: Bay homepage (re-read 11 October 2026) · Read 11 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% | 5 / 10 Names 3 of the six agents we track: Claude Code, OpenAI Codex and Claude Desktop. Source: Bay blog: Ghostjacking (August 2026) · Read 27 Sep 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 | Tie |
| Public proof | 10% | 3 / 10 The smallest public footprint of the scored products: a single homepage, two blog posts, no documentation portal and no published pricing. Source: Bay homepage · Read 27 Sep 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 | Bay | Prompt Security (SentinelOne) |
|---|---|---|
| Block or deny | Documented | Documented |
| Ask a person | Documented | Not described |
| Alert or warn | Not described | Not described |
| Mask or modify | Not described | Documented |
| Simulate first | Documented | Not described |
| Remove or scale back | Documented | Not described |
- Bay: "Returns Allow, Ask or Deny; new rules can run in Simulation Mode first; MCP Control removes disallowed MCP servers in Enforcement mode."
Source: Bay blog: Ghostjacking (re-read 11 October 2026) · Read 11 Oct 2026
Source: Bay homepage · Read 27 Sep 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?
Bay
Through existing EDR or MDM using Wave, an ephemeral binary that runs, scans and exits. Bay describes the product as agentless by design.
Source: Bay blog: Ghostjacking (August 2026) · Read 27 Sep 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 | Bay | Prompt Security (SentinelOne) |
|---|---|---|
| Claude Code | Named | Named |
| Cursor | Not named | Named |
| GitHub Copilot | Not named | Named |
| OpenAI Codex | Named | Not named |
| Windsurf | Not named | Not named |
| Claude Desktop | Named | Not named |
| Named | 3 of 6 | 3 of 6 |
Which should you choose?
Choose Bay if you need stop before it runs and capability rules. Bay is best for: Pre-execution control on employee devices, rolled out through EDR or MDM.
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, Bay or Prompt Security (SentinelOne)?
On our published weights Bay scores higher overall, 7.20 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, Bay or Prompt Security (SentinelOne)?
Bay scores higher on stopping an action before it runs (9 to 6). Bay: Evaluates prompts, pre-tool calls and post-tool responses on supported agent surfaces and returns Allow, Ask or Deny locally, stated as under 4ms (vendor-stated). Prompt Security (SentinelOne): Governs what agents and MCP servers can do; per-tool-call enforcement is not detailed.
Do Bay and Prompt Security (SentinelOne) publish prices?
Bay: not published. Bay publishes no pricing. Demo requests go through bay.io/demo. Prompt Security (SentinelOne): not published. SentinelOne publishes no pricing for Prompt Security.