Head to head · Checked against vendor sites, September 2026
Lasso Security vs Prompt Security (SentinelOne): AI agent security compared
The verdict
Lasso Security and Prompt Security tie overall on our weights at 6.6 out of 10. Lasso Security scores higher on tool-call control; Prompt Security scores higher on visibility and maturity. They tie on policy, footprint, identity and audit and breadth. Neither publishes list prices.
Prompt Security (SentinelOne)
Owner: SentinelOne (acquisition announced 5 August 2025)
Best for SentinelOne customers
How do Lasso Security and Prompt Security compare on each criterion?
| Criterion | Weight | Lasso Security | Prompt Security | Edge |
|---|---|---|---|---|
| Visibility | 22% | 6 | 7 | Prompt Security |
Why these scoresLasso Security: Discovers MCP servers across Claude, Cursor and Windsurf and AI tool use; device-level inventory is not detailed. Prompt Security: Inventories AI tools and code assistants, including shadow AI, and maps agents and MCP servers. | ||||
| Tool-call control | 20% | 8 | 6 | Lasso Security |
Why these scoresLasso Security: Inspects every tool call before it is executed through Claude Code lifecycle hooks; open-source MCP gateway with block, alert or sanitize. Prompt Security: Governs what agents and MCP servers can do; per-tool-call enforcement is not detailed. | ||||
| Policy | 15% | 7 | 7 | Tie |
Why these scoresLasso Security: Intent-aware policies, role-based permissions and DLP with masking. Prompt Security: Prevents prompt injection and data leakage for tools such as GitHub Copilot, Cursor and Claude Code. | ||||
| Identity and audit | 12% | 5 | 5 | Tie |
Why these scoresLasso Security: Detailed audit history of inputs and decisions; agent vs human attribution not described. Prompt Security: Agent vs human attribution not described on the pages we reviewed. | ||||
| Footprint | 13% | 6 | 6 | Tie |
Why these scoresLasso Security: Browser extension, proxy, gateway and Claude Code enterprise hooks; several components to run. Prompt Security: Built into the SentinelOne Singularity Platform; the deployment method is not detailed. | ||||
| Breadth | 8% | 8 | 8 | Tie |
Why these scoresLasso Security: AI apps, agents, red teaming and usage control. Prompt Security: Employees, developers and homegrown AI apps from testing to runtime. | ||||
| Maturity | 10% | 6 | 8 | Prompt Security |
Why these scoresLasso Security: Pricing and company backing not published on the pages we reviewed. Prompt Security: Backed by SentinelOne, which announced the acquisition on 5 August 2025; pricing not published. | ||||
| Total | 100% | 6.6 | 6.6 | Tie |
How do they deploy, and what do they cost?
| Attribute | Lasso Security | Prompt Security |
|---|---|---|
| Owner | Not acquired | SentinelOne (acquisition announced 5 August 2025) |
| How it reaches devices | Browser extension, proxy, gateway, Claude Code hooks | Part of Singularity Platform; method not published |
| Deployment detail | 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. | SentinelOne says Prompt Security deploys in minutes and is part of the Singularity Platform that protects endpoints, cloud, identity and data. The specific deployment method (browser extension, endpoint agent, IDE extension or proxy) is not detailed on the page we reviewed. |
| Pricing | Contact sales. Pricing is not published. | Contact sales. Pricing is not published. |
Source: lasso.security · Lasso MCP security · Lasso AI coding assistants · Lasso AI usage control · SentinelOne Prompt Security page · SentinelOne press release, 5 August 2025 · prompt.security · Reviewed Sep 2026
Which should you choose?
Choose Lasso Security if
- Your priority matches our designation for Lasso Security: best for MCP gateway and Claude Code hooks.
- You need to evaluate or stop individual tool calls before they run: Lasso Security scores 8 to 6.
Choose Prompt Security if
- Your priority matches our designation for Prompt Security: best for SentinelOne customers.
- Vendor maturity, public documentation and backing weigh heavily in procurement: Prompt Security scores 8 to 6.
- You need a fleet-wide inventory of AI agents, MCP servers, extensions and credentials on devices: Prompt Security scores 7 to 6.
Frequently asked questions
Which is better, Lasso Security or Prompt Security (SentinelOne)?
Lasso Security and Prompt Security tie overall on our weights at 6.6 out of 10. Lasso Security scores higher on tool-call control; Prompt Security scores higher on visibility and maturity. They tie on policy, footprint, identity and audit and breadth. Scores are editorial assessments from public vendor material, reviewed September 2026.
Do Lasso Security and Prompt Security (SentinelOne) publish prices?
No. Neither publishes list prices, so ask both for a quote.
Do Lasso Security or Prompt Security (SentinelOne) replace EDR?
No. The tools in this guide add control over AI agent actions and work alongside EDR. Lasso Security: Browser extension, proxy, gateway, Claude Code hooks. Prompt Security: Part of Singularity Platform; method not published.
Related
Sources
- 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
- SentinelOne Prompt Security page · Reviewed Sep 2026
- SentinelOne press release, 5 August 2025 · Reviewed Sep 2026
- prompt.security · Reviewed Sep 2026