Head to head · Checked against vendor sites, September 2026
Onyx Security vs Lasso Security: AI agent security compared
The verdict
Onyx Security scores higher overall on our weights (7.4 vs 6.6 out of 10). Onyx Security scores higher on visibility, policy, identity and audit, maturity and breadth; Lasso Security does not score higher on any criterion. They tie on tool-call control and footprint. Neither publishes list prices.
How do Onyx Security and Lasso Security compare on each criterion?
| Criterion | Weight | Onyx Security | Lasso Security | Edge |
|---|---|---|---|---|
| Visibility | 22% | 7 | 6 | Onyx Security |
Why these scoresOnyx Security: Discovers AI agents across SaaS, cloud, endpoint and code; endpoint inventory detail is lighter than endpoint-first tools. Lasso Security: Discovers MCP servers across Claude, Cursor and Windsurf and AI tool use; device-level inventory is not detailed. | ||||
| Tool-call control | 20% | 8 | 8 | Tie |
Why these scoresOnyx Security: Inspects every prompt, tool call and model response inline. Lasso Security: Inspects every tool call before it is executed through Claude Code lifecycle hooks; open-source MCP gateway with block, alert or sanitize. | ||||
| Policy | 15% | 8 | 7 | Onyx Security |
Why these scoresOnyx Security: Five enforcement actions: alert, block, mask, steer, or ask a human. Lasso Security: Intent-aware policies, role-based permissions and DLP with masking. | ||||
| Identity and audit | 12% | 7 | 5 | Onyx Security |
Why these scoresOnyx Security: Agent identity and access governance is a named solution. Lasso Security: Detailed audit history of inputs and decisions; agent vs human attribution not described. | ||||
| 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. Lasso Security: Browser extension, proxy, gateway and Claude Code enterprise hooks; several components to run. | ||||
| Breadth | 8% | 9 | 8 | Onyx Security |
Why these scoresOnyx Security: Browser AI, coding assistants, desktop agents, cloud workloads and MCP servers, plus agentic red teaming. Lasso Security: AI apps, agents, red teaming and usage control. | ||||
| Maturity | 10% | 7 | 6 | Onyx Security |
Why these scoresOnyx Security: $113M Series B announced 29 July 2026; SOC 2 Type II and ISO 27001 listed; pricing not published. Lasso Security: Pricing and company backing not published on the pages we reviewed. | ||||
| Total | 100% | 7.4 | 6.6 | Onyx Security |
How do they deploy, and what do they cost?
| Attribute | Onyx Security | Lasso Security |
|---|---|---|
| Owner | Not acquired | Not acquired |
| How it reaches devices | Endpoint agent, browser extension, API, gateway | Browser extension, proxy, gateway, Claude Code hooks |
| 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. | Lasso offers a browser extension, proxy integrations, its MCP gateway and Claude Code hook integration, and says it works with existing stacks such as Palo Alto Networks or CrowdStrike. |
| Pricing | Contact sales. Onyx Security does not publish pricing. | Contact sales. Pricing is not published. |
Source: onyx.security · Onyx AI security · Onyx Series B · lasso.security · Lasso MCP security · Lasso AI coding assistants · Lasso AI usage control · 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 need an audit record that separates agent actions from human actions: Onyx Security scores 7 to 5.
- You need a fleet-wide inventory of AI agents, MCP servers, extensions and credentials on devices: Onyx Security scores 7 to 6.
Choose Lasso Security if
- Your priority matches our designation for Lasso Security: best for MCP gateway and Claude Code hooks.
- Lasso Security does not score higher than Onyx Security on any criterion; it ties on tool-call control and footprint. It can still fit if it matches your existing stack.
Frequently asked questions
Which is better, Onyx Security or Lasso Security?
Onyx Security scores higher overall on our weights (7.4 vs 6.6 out of 10). Onyx Security scores higher on visibility, policy, identity and audit, maturity and breadth; Lasso Security does not score higher on any criterion. They tie on tool-call control and footprint. Scores are editorial assessments from public vendor material, reviewed September 2026.
Do Onyx Security and Lasso Security publish prices?
No. Neither publishes list prices, so ask both for a quote.
Do Onyx Security or Lasso Security 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. Lasso Security: Browser extension, proxy, gateway, Claude Code hooks.
Related
Sources
- onyx.security · Reviewed Sep 2026
- Onyx AI security · Reviewed Sep 2026
- Onyx Series B · Reviewed Sep 2026
- lasso.security · Reviewed Sep 2026
- Lasso MCP security · Reviewed Sep 2026
- Lasso AI coding assistants · Reviewed Sep 2026
- Lasso AI usage control · Reviewed Sep 2026