Head to head · Checked against vendor sites, September 2026
Onyx Security vs Zenity: AI agent security compared
The verdict
Onyx Security and Zenity tie overall on our weights at 7.4 out of 10. Onyx Security scores higher on policy and footprint; Zenity scores higher on visibility and maturity. They tie on tool-call control, identity and audit and breadth. Neither publishes list prices.
How do Onyx Security and Zenity compare on each criterion?
| Criterion | Weight | Onyx Security | Zenity | Edge |
|---|---|---|---|---|
| Visibility | 22% | 7 | 8 | Zenity |
Why these scoresOnyx Security: Discovers AI agents across SaaS, cloud, endpoint and code; endpoint inventory detail is lighter than endpoint-first tools. Zenity: Discovers coding and personal agents on laptops and desktops and the MCP servers, tools and data they connect to. | ||||
| Tool-call control | 20% | 8 | 8 | Tie |
Why these scoresOnyx Security: Inspects every prompt, tool call and model response inline. Zenity: Blocks or modifies a dangerous tool call before it executes through native agent hooks and the Zenity MCP gateway. | ||||
| Policy | 15% | 8 | 7 | Onyx Security |
Why these scoresOnyx Security: Five enforcement actions: alert, block, mask, steer, or ask a human. Zenity: Runtime Boundaries and AISPM; context-based rules described at platform level. | ||||
| Identity and audit | 12% | 7 | 7 | Tie |
Why these scoresOnyx Security: Agent identity and access governance is a named solution. Zenity: Agentic identity and access management is a named capability. | ||||
| Footprint | 13% | 6 | 5 | Onyx Security |
Why these scoresOnyx Security: Works across endpoint agents, browser extensions, APIs and gateways; the endpoint component is a resident agent or extension. Zenity: Endpoint deployment method is not published on the pages we reviewed. | ||||
| Breadth | 8% | 9 | 9 | Tie |
Why these scoresOnyx Security: Browser AI, coding assistants, desktop agents, cloud workloads and MCP servers, plus agentic red teaming. Zenity: Agentic SaaS, cloud and homegrown agents with a long integrations list, including Microsoft 365 Copilot, Copilot Studio, Salesforce Agentforce and ServiceNow. | ||||
| Maturity | 10% | 7 | 8 | Zenity |
Why these scoresOnyx Security: $113M Series B announced 29 July 2026; SOC 2 Type II and ISO 27001 listed; pricing not published. Zenity: Established agent security vendor with a wide public integrations catalog and analyst mentions cited by the vendor; pricing not published. | ||||
| Total | 100% | 7.4 | 7.4 | Tie |
How do they deploy, and what do they cost?
| Attribute | Onyx Security | Zenity |
|---|---|---|
| Owner | Not acquired | Not acquired |
| How it reaches devices | Endpoint agent, browser extension, API, gateway | Agent hooks and MCP gateway; method not published |
| Deployment detail | Onyx says it needs no SDK changes and works across endpoint agents, browser extensions, APIs and gateways. It integrates with Okta, Entra, Splunk and CrowdStrike. On devices this means a resident component, which is why it scores lower on footprint than tools that deploy through EDR or MDM. | 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. |
| Pricing | Contact sales. Onyx Security does not publish pricing. | Contact sales. Zenity does not publish pricing. |
Source: onyx.security · Onyx AI security · Onyx Series B · zenity.io · Zenity platform · Zenity coding and personal agents · Reviewed Sep 2026
Which should you choose?
Choose Onyx Security if
- Your priority matches our designation for Onyx Security: best for inline control across many AI surfaces.
- You want context-aware rules and answers beyond allow and block: Onyx Security scores 8 to 7.
- You want a light rollout with published deployment detail, ideally through existing EDR or MDM: Onyx Security scores 6 to 5.
Choose Zenity if
- Your priority matches our designation for Zenity: best for SaaS and Microsoft agent estates.
- You need a fleet-wide inventory of AI agents, MCP servers, extensions and credentials on devices: Zenity scores 8 to 7.
- Vendor maturity, public documentation and backing weigh heavily in procurement: Zenity scores 8 to 7.
Frequently asked questions
Which is better, Onyx Security or Zenity?
Onyx Security and Zenity tie overall on our weights at 7.4 out of 10. Onyx Security scores higher on policy and footprint; Zenity scores higher on visibility and maturity. They tie on tool-call control, identity and audit and breadth. Scores are editorial assessments from public vendor material, reviewed September 2026.
Do Onyx Security and Zenity publish prices?
No. Neither publishes list prices, so ask both for a quote.
Do Onyx Security or Zenity replace EDR?
No. The tools in this guide add control over AI agent actions and work alongside EDR. Onyx Security: Endpoint agent, browser extension, API, gateway. Zenity: Agent hooks and MCP gateway; method not published.
Related
Sources
- onyx.security · Reviewed Sep 2026
- Onyx AI security · Reviewed Sep 2026
- Onyx Series B · Reviewed Sep 2026
- zenity.io · Reviewed Sep 2026
- Zenity platform · Reviewed Sep 2026
- Zenity coding and personal agents · Reviewed Sep 2026