HEAD TO HEAD
Koi (Palo Alto Networks) matched with Onyx Security: agentic endpoint security compared
SHORT ANSWER
On our published weights Onyx Security scores higher overall, 6.85 to 5.75 out of 10. Koi scores higher on named agent coverage; Onyx scores higher on stop before it runs, verdict range, actor trail and cloud and workspace reach; they tie on capability rules, rollout path 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?
Koi (Palo Alto Networks)
Palo Alto Networks (acquisition completed 14 April 2026)
Palo Alto Networks Cortex XDR estates
Rank 7 of 8 among broader AI security platforms
Onyx Security
Inline control with the widest set of verdicts
Rank 2 of 8 among broader AI security platforms
Which scores higher on each criterion?
| Criterion | Weight | Koi (Palo Alto Networks) | Onyx Security | Higher |
|---|---|---|---|---|
| Stop before it runs | 25% | 7 / 10 Stops malicious actions, blocks unsafe AI application interactions and prevents prompt injections; tool-call decision mechanics are not published. Source: Palo Alto Networks: Cortex Agentic Endpoint Security · Read 27 Sep 2026 | 8 / 10 Inspects every prompt, tool call and model response inline before acting on it. Source: Onyx Security: AI security platform · Read 27 Sep 2026 | Onyx |
| Verdict range | 15% | 3 / 10 Documents 2 of six verdict types: Block or deny and Remove or scale back. "Stops malicious actions and offers one-click removal of insecure packages, extensions and AI tools." Source: Palo Alto Networks: Cortex Agentic Endpoint Security · Read 27 Sep 2026 | 7 / 10 Documents 4 of six verdict types: Block or deny, Ask a person, Alert or warn and Mask or modify. "Five actions: alert, block, mask, steer, or ask." Source: Onyx Security: AI security platform · Read 27 Sep 2026 | Onyx |
| Capability rules | 15% | 6 / 10 Out-of-the-box policies, agent runtime custom policies and one-click removal of insecure packages, extensions and AI tools. Source: Palo Alto Networks blog: A Quarter of Innovation with Koi Agentic Endpoint Security (18 August 2026) · Read 11 Oct 2026 | 6 / 10 Agent posture covers misconfigurations, excessive permissions and credential handling; rules by capability type (shell, packages, cloud CLIs) are not itemized. Source: Onyx Security: AI security platform · Read 27 Sep 2026 | Tie |
| Actor trail | 10% | 5 / 10 Agent versus person attribution is not described on the pages we read. Source: Palo Alto Networks: Cortex Agentic Endpoint Security · Read 27 Sep 2026 | 7 / 10 Agent identity and access governance is a named solution; per-action attribution detail is lighter than the leader. Source: Onyx Security homepage · Read 27 Sep 2026 | Onyx |
| Rollout path | 10% | 6 / 10 Agent-based: a Cortex XDR module or a standalone offering. Source: Palo Alto Networks press release: Koi acquisition completed (14 April 2026) · Read 27 Sep 2026 | 6 / 10 Endpoint agents, browser extensions, APIs and gateways; the device component is resident software. Source: Onyx Security: AI security platform · Read 27 Sep 2026 | Tie |
| Cloud and workspace reach | 10% | 6 / 10 An endpoint product; Palo Alto Networks is integrating Koi with Prisma AIRS for wider AI coverage. Source: Palo Alto Networks press release: Koi acquisition completed (14 April 2026) · Read 27 Sep 2026 | 9 / 10 Covers cloud workloads alongside browser AI, coding assistants, desktop agents and MCP servers, across SaaS, cloud, endpoint and code. Source: Onyx Security: AI security platform · Read 27 Sep 2026 | Onyx |
| Named agent coverage | 5% | 5 / 10 Names 3 of the six agents we track: Claude Code, Cursor and OpenAI Codex. Source: Palo Alto Networks blog: A Quarter of Innovation with Koi Agentic Endpoint Security (18 August 2026) · Read 11 Oct 2026 | 0 / 10 Names 0 of the six agents we track: none. Source: Onyx Security: AI security platform · Read 27 Sep 2026 | Koi |
| Public proof | 10% | 7 / 10 Acquisition by Palo Alto Networks completed 14 April 2026; pricing not published. Source: Palo Alto Networks press release: Koi acquisition completed (14 April 2026) · Read 27 Sep 2026 | 7 / 10 Series B of $113M announced 29 July 2026; SOC 2 Type II and ISO 27001 listed; pricing not published. Source: Onyx Security blog: $113M Series B (29 July 2026) · Read 27 Sep 2026 | Tie |
Which verdicts does each document?
| Verdict type | Koi (Palo Alto Networks) | Onyx Security |
|---|---|---|
| Block or deny | Documented | Documented |
| Ask a person | Not described | Documented |
| Alert or warn | Not described | Documented |
| Mask or modify | Not described | Documented |
| Simulate first | Not described | Not described |
| Remove or scale back | Documented | Not described |
- Koi (Palo Alto Networks): "Stops malicious actions and offers one-click removal of insecure packages, extensions and AI tools."
Source: Palo Alto Networks: Cortex Agentic Endpoint Security · Read 27 Sep 2026
- Onyx Security: "Five actions: alert, block, mask, steer, or ask."
Source: Onyx Security: AI security platform · Read 27 Sep 2026
How does each reach devices?
Koi (Palo Alto Networks)
A Cortex XDR module, or a standalone agent-based offering.
Source: Palo Alto Networks press release: Koi acquisition completed (14 April 2026) · Read 27 Sep 2026
Onyx Security
Endpoint agents, browser extensions, APIs and gateways; Onyx says no SDK changes are needed.
Source: Onyx Security: AI security platform · Read 27 Sep 2026
Which agents does each name?
| Agent | Koi (Palo Alto Networks) | Onyx Security |
|---|---|---|
| Claude Code | Named | Not named |
| Cursor | Named | Not named |
| GitHub Copilot | Not named | Not named |
| OpenAI Codex | Named | Not named |
| Windsurf | Not named | Not named |
| Claude Desktop | Not named | Not named |
| Named | 3 of 6 | 0 of 6 |
Which should you choose?
Choose Koi (Palo Alto Networks) if you need stop before it runs and public proof. Koi (Palo Alto Networks) is best for: Palo Alto Networks Cortex XDR estates.
Choose Onyx Security if you need cloud and workspace reach and stop before it runs. Onyx Security is best for: Inline control with the widest set of verdicts.
Frequently asked questions
Which is better for agentic endpoint security, Koi (Palo Alto Networks) or Onyx Security?
On our published weights Onyx Security scores higher overall, 6.85 to 5.75 out of 10. See the criterion table above for where each scores higher.
Which stops an agent action before it runs more fully, Koi (Palo Alto Networks) or Onyx Security?
Onyx Security scores higher on stopping an action before it runs (8 to 7). Koi (Palo Alto Networks): Stops malicious actions, blocks unsafe AI application interactions and prevents prompt injections; tool-call decision mechanics are not published. Onyx Security: Inspects every prompt, tool call and model response inline before acting on it.
Do Koi (Palo Alto Networks) and Onyx Security publish prices?
Koi (Palo Alto Networks): not published. Palo Alto Networks publishes no pricing for Cortex Agentic Endpoint Security. Onyx Security: not published. Onyx Security publishes no pricing.