HEAD TO HEAD
Bay matched with Harmonic Security: agentic endpoint security compared
SHORT ANSWER
On our published weights Bay scores higher overall, 7.20 to 5.90 out of 10. Bay scores higher on stop before it runs, verdict range, capability rules, actor trail, rollout path and named agent coverage; Harmonic scores higher on cloud and workspace reach 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?
Bay
Pre-execution control on employee devices, rolled out through EDR or MDM
Rank 1 of 6 among agentic endpoint vendors
Harmonic Security
Coaching people through AI data risk
Rank 6 of 8 among broader AI security platforms
Which scores higher on each criterion?
| Criterion | Weight | Bay | Harmonic Security | 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 | 7 / 10 Governs at the MCP layer and at the tool surface and can block in real time. Source: Harmonic Security: Harmonic Command · 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 Alert or warn. "Block in real time, warn the employee with context, or log silently." Source: Harmonic Security homepage · Read 27 Sep 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 | 7 / 10 Harmonic Command sets which systems agents can read, write to and act on. Source: Harmonic Security: Harmonic Command · 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 | 6 / 10 Unified governance for people and agents; per-action attribution is not detailed. Source: Harmonic Security: Harmonic Command · 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 | 8 / 10 Rolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 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 | 4 / 10 Browser, desktop, CLI, MCP gateway and API surfaces; agents running in cloud workspaces or cloud apps are not described. Source: Harmonic Security homepage · Read 27 Sep 2026 | Harmonic |
| 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 | 3 / 10 Names 2 of the six agents we track: Claude Code and GitHub Copilot. Source: Harmonic Security pricing (re-read 11 October 2026) · Read 11 Oct 2026 | Bay |
| 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 | 7 / 10 Tier names are published (Explore, Guide, Command) but no prices. Source: Harmonic Security pricing · Read 27 Sep 2026 | Harmonic |
Which verdicts does each document?
| Verdict type | Bay | Harmonic Security |
|---|---|---|
| Block or deny | Documented | Documented |
| Ask a person | Documented | Not described |
| Alert or warn | Not described | Documented |
| Mask or modify | Not described | Not described |
| 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
- Harmonic Security: "Block in real time, warn the employee with context, or log silently."
Source: Harmonic Security homepage · Read 27 Sep 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
Harmonic Security
Intune, JAMF, Kandji or Group Policy.
Source: Harmonic Security homepage · Read 27 Sep 2026
Which agents does each name?
| Agent | Bay | Harmonic Security |
|---|---|---|
| Claude Code | Named | Named |
| Cursor | Not named | Not 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 | 2 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 Harmonic Security if you need rollout path and stop before it runs. Harmonic Security is best for: Coaching people through AI data risk.
Frequently asked questions
Which is better for agentic endpoint security, Bay or Harmonic Security?
On our published weights Bay scores higher overall, 7.20 to 5.90 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 Harmonic Security?
Bay scores higher on stopping an action before it runs (9 to 7). 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). Harmonic Security: Governs at the MCP layer and at the tool surface and can block in real time.
Do Bay and Harmonic Security publish prices?
Bay: not published. Bay publishes no pricing. Demo requests go through bay.io/demo. Harmonic Security: not published. Three tiers are named (Explore, Guide, Command); prices are not published.