Head to head · Checked against vendor sites, September 2026
Noma Security vs Prompt Security (SentinelOne): AI agent security compared
The verdict
Noma Security scores higher overall on our weights (7.5 vs 6.6 out of 10). Noma Security scores higher on visibility, tool-call control, footprint, identity and audit and breadth; Prompt Security scores higher on maturity. They tie on policy. Neither publishes list prices.
Prompt Security (SentinelOne)
Owner: SentinelOne (acquisition announced 5 August 2025)
Best for SentinelOne customers
How do Noma Security and Prompt Security compare on each criterion?
| Criterion | Weight | Noma Security | Prompt Security | Edge |
|---|---|---|---|---|
| Visibility | 22% | 8 | 7 | Noma Security |
Why these scoresNoma Security: Discovers endpoint agents such as Claude Code, Cursor and Codex with their MCP servers and skills. Prompt Security: Inventories AI tools and code assistants, including shadow AI, and maps agents and MCP servers. | ||||
| Tool-call control | 20% | 7 | 6 | Noma Security |
Why these scoresNoma Security: Blocks unauthorized and malicious agents and stops risky behavior at runtime; per-tool-call mechanics are described less specifically. Prompt Security: Governs what agents and MCP servers can do; per-tool-call enforcement is not detailed. | ||||
| Policy | 15% | 7 | 7 | Tie |
Why these scoresNoma Security: Runtime inspection across the event, the session, the identity behind the agent and the data it reaches; action types beyond block not detailed. Prompt Security: Prevents prompt injection and data leakage for tools such as GitHub Copilot, Cursor and Claude Code. | ||||
| Identity and audit | 12% | 7 | 5 | Noma Security |
Why these scoresNoma Security: Keeps a live registry of allowed agents, MCP servers and skills and inspects the identity behind each agent. Prompt Security: Agent vs human attribution not described on the pages we reviewed. | ||||
| Footprint | 13% | 8 | 6 | Noma Security |
Why these scoresNoma Security: Discovers endpoint agents through existing EDR or MDM with no new endpoint agent to deploy. Prompt Security: Built into the SentinelOne Singularity Platform; the deployment method is not detailed. | ||||
| Breadth | 8% | 9 | 8 | Noma Security |
Why these scoresNoma Security: Covers endpoint, SaaS and homegrown agents, plus AI-SPM and AI red teaming. Prompt Security: Employees, developers and homegrown AI apps from testing to runtime. | ||||
| Maturity | 10% | 7 | 8 | Prompt Security |
Why these scoresNoma Security: SOC 2, ISO 27001, ISO 9001 and HIPAA listed; Gartner recognition cited by the vendor; pricing not published. Prompt Security: Backed by SentinelOne, which announced the acquisition on 5 August 2025; pricing not published. | ||||
| Total | 100% | 7.5 | 6.6 | Noma Security |
How do they deploy, and what do they cost?
| Attribute | Noma Security | Prompt Security |
|---|---|---|
| Owner | Not acquired | SentinelOne (acquisition announced 5 August 2025) |
| How it reaches devices | Through existing EDR or MDM | Part of Singularity Platform; method not published |
| Deployment detail | Noma states that it discovers agents, MCP servers and skills on employee endpoints through your existing EDR or MDM, with no new endpoint agent to deploy. SaaS and homegrown agent coverage connects through the platforms and environments where those agents run. | 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. Noma Security does not publish pricing. | Contact sales. Pricing is not published. |
Source: noma.security · Noma endpoint agents · Noma platform · SentinelOne Prompt Security page · SentinelOne press release, 5 August 2025 · prompt.security · Reviewed Sep 2026
Which should you choose?
Choose Noma Security if
- Your priority matches our designation for Noma Security: best for endpoint plus SaaS and homegrown agents.
- You want a light rollout with published deployment detail, ideally through existing EDR or MDM: Noma Security scores 8 to 6.
- You need an audit record that separates agent actions from human actions: Noma Security scores 7 to 5.
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 7.
Frequently asked questions
Which is better, Noma Security or Prompt Security (SentinelOne)?
Noma Security scores higher overall on our weights (7.5 vs 6.6 out of 10). Noma Security scores higher on visibility, tool-call control, footprint, identity and audit and breadth; Prompt Security scores higher on maturity. They tie on policy. Scores are editorial assessments from public vendor material, reviewed September 2026.
Do Noma Security and Prompt Security (SentinelOne) publish prices?
No. Neither publishes list prices, so ask both for a quote.
Do Noma Security or Prompt Security (SentinelOne) replace EDR?
No. The tools in this guide add control over AI agent actions and work alongside EDR. Noma Security: Through existing EDR or MDM. Prompt Security: Part of Singularity Platform; method not published.
Related
Sources
- noma.security · Reviewed Sep 2026
- Noma endpoint agents · Reviewed Sep 2026
- Noma platform · Reviewed Sep 2026
- SentinelOne Prompt Security page · Reviewed Sep 2026
- SentinelOne press release, 5 August 2025 · Reviewed Sep 2026
- prompt.security · Reviewed Sep 2026