Head to head · Checked against vendor sites, September 2026
Onyx Security vs Ent: AI agent security compared
The verdict
Onyx Security scores higher overall on our weights (7.4 vs 6.7 out of 10). Onyx Security scores higher on tool-call control, maturity and breadth; Ent leads on no criterion. They tie on visibility, policy, footprint and identity and audit. Neither publishes list prices.
How do Onyx Security and Ent compare on each criterion?
| Criterion | Weight | Onyx Security | Ent | Edge |
|---|---|---|---|---|
| Visibility | 22% | 7 | 7 | Tie |
Why these scoresOnyx Security: Discovers AI agents across SaaS, cloud, endpoint and code; endpoint inventory detail is lighter than endpoint-first tools. Ent: A live view of OpenAI Codex, Claude Code, Claude Cowork, GitHub Copilot, Cursor and other AI tools and agents; MCP server and credential inventory is not itemized. | ||||
| Tool-call control | 20% | 8 | 7 | Onyx Security |
Why these scoresOnyx Security: Inspects every prompt, tool call and model response inline. Ent: Steps in at the moment of risk and blocks risky agent behavior; per-tool-call mechanics are not described on the pages we read. | ||||
| Policy | 15% | 8 | 8 | Tie |
Why these scoresOnyx Security: Five enforcement actions: alert, block, mask, steer, or ask a human. Ent: One programmable, intent-aware policy for people and AI agents, with responses from a soft nudge to a hard block, and app control that can allow, block, deny or restrict usage; an on-device small language model classifies sensitive data. | ||||
| Identity and audit | 12% | 7 | 7 | Tie |
Why these scoresOnyx Security: Agent identity and access governance is a named solution. Ent: Applies the same policy to people and agents and builds investigation timelines annotated in plain language as events happen. | ||||
| Footprint | 13% | 6 | 6 | Tie |
Why these scoresOnyx Security: Works across endpoint agents, browser extensions, APIs and gateways; the endpoint component is a resident agent or extension. Ent: A single lightweight agent across Windows, macOS, Linux and modern browsers, as SaaS or self-hosted in your own cloud; rollout through MDM is not stated. | ||||
| Breadth | 8% | 9 | 6 | Onyx Security |
Why these scoresOnyx Security: Browser AI, coding assistants, desktop agents, cloud workloads and MCP servers, plus agentic red teaming. Ent: Endpoint and browser coverage for insider risk, last-mile threats such as ClickFix, AI usage control and data security; SaaS agents and cloud workloads are not described. | ||||
| Maturity | 10% | 7 | 5 | Onyx Security |
Why these scoresOnyx Security: $113M Series B announced 29 July 2026; SOC 2 Type II and ISO 27001 listed; pricing not published. Ent: Came out of stealth on 16 June 2026 with a $100 million seed led by Decibel; founders co-founded RiskIQ; no documentation portal or pricing on ent.ai. | ||||
| Total | 100% | 7.4 | 6.7 | Onyx Security |
How do they deploy, and what do they cost?
| Attribute | Onyx Security | Ent |
|---|---|---|
| Owner | Not acquired | Not acquired |
| How it reaches devices | Endpoint agent, browser extension, API, gateway | Single lightweight agent; SaaS or self-hosted |
| 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. | A single lightweight agent across Windows, macOS, Linux and modern browsers, as SaaS or self-hosted in your own cloud. Rollout through MDM is not stated. |
| Pricing | Contact sales. Onyx Security does not publish pricing. | Contact sales. Ent does not publish pricing. |
Source: onyx.security · Onyx AI security · Onyx Series B · ent.ai · Ent press: intent-aware prevention (30 Jul 2026) · Ent press: $100M seed (16 Jun 2026) · Ent company · 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.
- Your agents also run in SaaS platforms, cloud workloads or apps you build: Onyx Security scores 9 to 6.
- Vendor maturity, public documentation and backing weigh heavily in procurement: Onyx Security scores 7 to 5.
Choose Ent if
- Your priority matches our designation for Ent: best for one intent-aware policy across people and agents.
- Against Onyx Security, Ent leads on no criterion; it ties on visibility, policy, footprint and identity and audit. It can still fit if it matches your existing stack.
Frequently asked questions
Which is better, Onyx Security or Ent?
Onyx Security scores higher overall on our weights (7.4 vs 6.7 out of 10). Onyx Security scores higher on tool-call control, maturity and breadth; Ent leads on no criterion. They tie on visibility, policy, footprint and identity and audit. Scores are editorial assessments from public vendor material, reviewed September 2026.
Do Onyx Security and Ent publish prices?
No. Neither publishes list prices, so ask both for a quote.
Do Onyx Security or Ent 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. Ent: Single lightweight agent; SaaS or self-hosted.
Related
Sources
- onyx.security · Reviewed Sep 2026
- Onyx AI security · Reviewed Sep 2026
- Onyx Series B · Reviewed Sep 2026
- ent.ai · Reviewed Sep 2026
- Ent press: intent-aware prevention (30 Jul 2026) · Reviewed Sep 2026
- Ent press: $100M seed (16 Jun 2026) · Reviewed Sep 2026
- Ent company · Reviewed Sep 2026