Head to head · Checked against vendor sites, September 2026
Neo vs Prompt Security (SentinelOne): AI agent security compared
The verdict
Neo scores higher overall on our weights (7.5 vs 6.6 out of 10). Neo scores higher on visibility, tool-call control, policy and identity and audit; Prompt Security scores higher on maturity and breadth. They tie on footprint. Neither publishes list prices.
Prompt Security (SentinelOne)
Owner: SentinelOne (acquisition announced 5 August 2025)
Best for SentinelOne customers
How do Neo and Prompt Security compare on each criterion?
| Criterion | Weight | Neo | Prompt Security | Edge |
|---|---|---|---|---|
| Visibility | 22% | 9 | 7 | Neo |
Why these scoresNeo: Live inventory of agents, models, skills, MCP servers and extensions on every endpoint, with risk scores from its Neoverse knowledge base. Prompt Security: Inventories AI tools and code assistants, including shadow AI, and maps agents and MCP servers. | ||||
| Tool-call control | 20% | 8 | 6 | Neo |
Why these scoresNeo: Intercepts agent actions at the endpoint and allows, blocks or holds them for approval before they run. Prompt Security: Governs what agents and MCP servers can do; per-tool-call enforcement is not detailed. | ||||
| Policy | 15% | 8 | 7 | Neo |
Why these scoresNeo: Policies built with a built-in LLM, such as Block secret reads or Hold exports over 10 MB; actions are allow, block, redirect or hold for verified human approval, with an audit mode before enforcement. Prompt Security: Prevents prompt injection and data leakage for tools such as GitHub Copilot, Cursor and Claude Code. | ||||
| Identity and audit | 12% | 8 | 5 | Neo |
Why these scoresNeo: Ties every action to the human or agent that caused it, in what Neo calls an immutable audit chain, with alerts to a SIEM. Prompt Security: Agent vs human attribution not described on the pages we reviewed. | ||||
| Footprint | 13% | 6 | 6 | Tie |
Why these scoresNeo: A lightweight endpoint sensor with no kernel module, no reboot and no OS hooks; analysis stays on the device. It is a new sensor rather than a rollout through existing EDR, and OS support is not listed on the pages we read. Prompt Security: Built into the SentinelOne Singularity Platform; the deployment method is not detailed. | ||||
| Breadth | 8% | 6 | 8 | Prompt Security |
Why these scoresNeo: Its platform page names desktop and SaaS AI such as ChatGPT Desktop, Slack AI, Notion AI and Salesforce Agentforce alongside coding agents; cloud workloads and red teaming are not described. Prompt Security: Employees, developers and homegrown AI apps from testing to runtime. | ||||
| Maturity | 10% | 5 | 8 | Prompt Security |
Why these scoresNeo: Came out of stealth on 20 July 2026 with $100M from Andreessen Horowitz and Bessemer; no documentation portal or pricing on neo.ai. Prompt Security: Backed by SentinelOne, which announced the acquisition on 5 August 2025; pricing not published. | ||||
| Total | 100% | 7.5 | 6.6 | Neo |
How do they deploy, and what do they cost?
| Attribute | Neo | Prompt Security |
|---|---|---|
| Owner | Not acquired | SentinelOne (acquisition announced 5 August 2025) |
| How it reaches devices | Own endpoint sensor | Part of Singularity Platform; method not published |
| Deployment detail | A lightweight endpoint sensor with no kernel module, no reboot and no OS hooks; analysis stays on the device. It is a new sensor rather than a rollout through existing EDR, and OS support is not listed on the pages we read. | 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. Neo does not publish pricing. | Contact sales. Pricing is not published. |
Source: neo.ai · Neo platform · Neo launch announcement (20 Jul 2026) · SentinelOne Prompt Security page · SentinelOne press release, 5 August 2025 · prompt.security · Reviewed Sep 2026
Which should you choose?
Choose Neo if
- Your priority matches our designation for Neo: best for approval holds and an agent-level audit trail.
- You need an audit record that separates agent actions from human actions: Neo scores 8 to 5.
- You need a fleet-wide inventory of AI agents, MCP servers, extensions and credentials on devices: Neo scores 9 to 7.
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 5.
- Your agents also run in SaaS platforms, cloud workloads or apps you build: Prompt Security scores 8 to 6.
Frequently asked questions
Which is better, Neo or Prompt Security (SentinelOne)?
Neo scores higher overall on our weights (7.5 vs 6.6 out of 10). Neo scores higher on visibility, tool-call control, policy and identity and audit; Prompt Security scores higher on maturity and breadth. They tie on footprint. Scores are editorial assessments from public vendor material, reviewed September 2026.
Do Neo and Prompt Security (SentinelOne) publish prices?
No. Neither publishes list prices, so ask both for a quote.
Do Neo or Prompt Security (SentinelOne) replace EDR?
No. The tools in this guide add control over AI agent actions and work alongside EDR. Neo: Own endpoint sensor. Prompt Security: Part of Singularity Platform; method not published.
Related
Sources
- neo.ai · Reviewed Sep 2026
- Neo platform · Reviewed Sep 2026
- Neo launch announcement (20 Jul 2026) · Reviewed Sep 2026
- SentinelOne Prompt Security page · Reviewed Sep 2026
- SentinelOne press release, 5 August 2025 · Reviewed Sep 2026
- prompt.security · Reviewed Sep 2026