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Prompt Security

Runtime AI security with an AI red teaming add-on, now part of SentinelOne

Automated platformAgents and toolsRuntime guardrails

Prompt Security protects employee AI use, homegrown AI apps and agents at runtime. SentinelOne, which valued the total deal consideration at $159.3M in its 10-Q, launched Prompt AI Red Teaming at RSAC 2026 to simulate prompt injection, jailbreaks, privilege escalation and data poisoning against homegrown apps. It also maintains the open-source Prompt Fuzzer.

Best for: SentinelOne customers adding AI app testing to runtime protection.

Acquired by SentinelOne (closed Sep 2025)

  • – Maps to OWASP
  • – Maps to MITRE ATLAS
  • – Maps to the EU AI Act
  • – SOC 2 or ISO 27001
Visit Prompt Security

Facts checked November 9, 2026 against the sources listed below. Prompt Security does not pay to appear here.

1 Legal namePrompt Security (SentinelOne)
2 HeadquartersTel Aviv, Israel (before acquisition)
3 Founded2023
4 TeamNot disclosed
5 What they testLLM apps, Agents and tool use, MCP servers, Prompt injection and jailbreaks, Data leakage
6 FrameworksNot disclosed
7 CertificationsNot disclosed
8 Published pricesNot disclosed
9 Customers and partnersSaid before the deal that it secured dozens of enterprises, including several Fortune 500 companies, none named.

Worth knowing before you sign

  • Red teaming is a 2026 add-on to a runtime product.
  • No named customers or framework mappings on prompt.security.
  • Sold through SentinelOne; the standalone brand is being folded into Singularity.

Go to Prompt Security's site

Sources

  1. SentinelOne 10-Q: closing and price
  2. Vendor blog: a new chapter with SentinelOne
  3. Vendor: homepage
  4. SentinelOne RSAC 2026 release

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