CISO Tribune

Vendor comparison · 2 companies

Holistic AI vs Prompt Security

Holistic AI sells an enterprise AI governance platform that lets customers discover every model, agent and application, assess AI risk and enforce policies. Prompt Security offers protection for both employee use of AI tools and the apps an organization builds. CISO Tribune files both under AI model and agent security. This page sets the two records side by side: what each sells, where it is based, who owns and funds it, the customers it names and its recent news, each fact numbered to its source.

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  • Holistic AI
  • Prompt Security
Holistic AI vs Prompt Security: Products, Customers and Funding Compared
Holistic AIHolistic AI sells an enterprise AI governance platform that lets customers discover every model, agent and application, assess AI risk and enforce policies.holisticai.comPrompt SecurityPrompt Security offers protection for both employee use of AI tools and the apps an organization builds.prompt.security
What it sells
  • Sentinel Agents[4]Continuously monitor what a customer's AI says in production.
  • Operative Agents[4]Step in inline when risk crosses a defined threshold.
  • Prompt Fuzzer[4]An open source tool for AI vulnerability assessment.
Categories
Headquarters
San Francisco, United States[2]Not stated on its pages
Founded
2020[3]2023[1]
Ownership and funding
Privately held[4]Owned by SentinelOne since 2025[3][7][8][10]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
Not stated on its pagesNot stated on its pages
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 10, 2026[10]
  • Gartner Peer Insights: Not stated on its pages
Who it fits
From its own pages, Holistic AI sells mainly to enterprises that deploy AI at scale, including LLMs, generative AI and agents. Its pages address teams responsible for AI risk, with Security, Legal and Boards named as the audiences for compliance proof. The platform connects to cloud, code and SaaS environments through read-only integrations.Not written yet
Last verified
September 27, 2026September 27, 2026

Where they overlap

  • Holistic AI and Prompt Security are both filed under AI model and agent security.

Where they differ, field by field

  • Holistic AI's primary category is AI governance; Prompt Security's is AI firewalls and guardrails.
  • Prompt Security is also filed under Workforce AI usage security.
  • Holistic AI lists Sentinel Agents and Operative Agents. Prompt Security lists Prompt Fuzzer.
  • Holistic AI is headquartered in San Francisco, United States.
  • Holistic AI was founded in 2020. Prompt Security was founded in 2023.
  • Holistic AI is privately held. Prompt Security is owned by SentinelOne, since 2025.

What it sells: Holistic AI

What Sentinel Agents does[4]
The platform page says Sentinel Agents continuously monitor what AI says in production. The risks named are prompt injection, jailbreaks, data leakage, hallucination and toxicity. The page says they work without interrupting workflows.
What Operative Agents does[4]
The platform page says that when risk crosses a defined threshold, Operative Agents step in inline. They govern which tools the AI calls, what it can access and how much it can spend, in real time.

What it sells: Prompt Security

What Prompt Fuzzer does[4]
Prompt Fuzzer is listed under AI Security Tools on the Prompt Security site. The site describes it as an open source tool for AI vulnerability assessment.

Questions about Holistic AI and Prompt Security

What do Holistic AI and Prompt Security sell?
Holistic AI sells Sentinel Agents and Operative Agents. Prompt Security sells Prompt Fuzzer.
Are Holistic AI and Prompt Security in the same category?
They share AI model and agent security. Holistic AI's primary category is AI governance and Prompt Security's is AI firewalls and guardrails.
Where are Holistic AI and Prompt Security headquartered?
Holistic AI is headquartered in San Francisco, United States.
When were Holistic AI and Prompt Security founded?
Holistic AI was founded in 2020. Prompt Security was founded in 2023.
Who owns Holistic AI and Prompt Security?
Holistic AI is privately held. Prompt Security is owned by SentinelOne, since 2025.
Who are Holistic AI and Prompt Security sold to?
From its own pages, Holistic AI sells mainly to enterprises that deploy AI at scale, including LLMs, generative AI and agents.

About Holistic AI

Holistic AI sells an enterprise AI governance platform that lets customers discover every model, agent and application, assess AI risk and enforce policies.[1]

Holistic AI describes the problem as AI shipping faster than it can be governed. Its home page says new AI agents, LLMs and vendor tools go live every week, while AI inventory, risk assessments and compliance evidence still live in spreadsheets. The page also says that without AI discovery, nobody holds a complete and current inventory of what is actually running.[1]

The platform is organised around three layers: Identify, Protect and Enforce. The platform page says Identify continuously discovers and inventories every model, agent, API and pipeline across cloud, code and vendors, including shadow AI. The same page says Protect assesses, tests and red teams every system, from static models to multi-agent workflows. Enforce turns governance policy into enforceable workflows, maps controls to regulations, and generates audit-ready evidence on demand.[1]

On the risk side, the home page says the platform runs red teaming for prompt injection and jailbreaks, and 40+ tests for bias, hallucination, privacy and robustness. Holistic AI also says it monitors drift and performance in production. For agentic systems, Agent Graph maps the relationships among agents, tools, tasks and data so organizations can assess the system as a whole.[1][7]

Sentinel Agents monitor what an AI says in production, and Operative Agents step in inline when risk crosses a defined threshold. The platform page says enforcement runs inline via the HAI Guardian SDK.

For deployment, Holistic AI says its integrations are read-only and need no agents to install.

Holistic AI also offers an independent audit under the Digital Services Act.[5]

Holistic AI began at University College London, where Dr Adriano Koshiyama and Dr Emre Kazim set out to solve the governance problem. Its stated mission is to empower enterprises to adopt and scale AI with confidence.[6]

The trust center also says Holistic AI does not use customer data to train models.[1][5][6][8][9]

Holistic AI on the record

Sources

Holistic AI full record

  1. [1]Holistic AI – The Leading AI Governance PlatformHolistic AI · undated page, accessed September 27, 2026 · Tier A
  2. [2]About Holistic AI- The Leading AI Governance PlatformHolistic AI · undated page, accessed September 27, 2026 · Tier A
  3. [3]Holistic AI Launches Open Source Library to Advance Responsible AIHolistic AI via Business Wire · businesswire.com · published October 22, 2024 · Tier A
  4. [4]An End to End AI Governance Platform - Holistic AIHolistic AI · undated page, accessed October 25, 2026 · Tier A
  5. [5]Digital Services Act ComplianceHolistic AI · undated page, accessed October 25, 2026 · Tier A
  6. [6]Seamless Integrations for Enterprise AI Governance - Holistic AIHolistic AI · undated page, accessed October 25, 2026 · Tier A
  7. [7]Holistic AI named a Challenger in the 2026 Gartner Magic Quadrant for AI Governance PlatformsHolistic AI · undated page, accessed November 5, 2026 · Tier A
  8. [8]Customer Success Stories | Holistic AIHolistic AI · undated page, accessed November 5, 2026 · Tier A
  9. [9]Trust Center - Holistic AIHolistic AI · undated page, accessed November 5, 2026 · Tier A

Prompt Security full record

  1. [1]Prompt security partners with f5 to secure genai applications with a firewall for ai 302131373Prompt Security via PR Newswire · prnewswire.com · published April 30, 2024 · Tier A
  2. [2]Securing ai promptSentinelOne · sentinelone.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]Sentinelone completes acquisition of prompt securitySentinelOne via The Globe and Mail · theglobeandmail.com · published September 5, 2025 · Tier A
  4. [4]Prompt Security | From SentinelOnePrompt Security · undated page, accessed October 27, 2026 · Tier A
  5. [5]AI Security | AI Glossary | Prompt SecurityPrompt Security · undated page, accessed October 27, 2026 · Tier A
  6. [6]ClawSec: A Security Skill Suite for OpenClaw AgentsPrompt Security · undated page, accessed October 27, 2026 · Tier A
  7. [7]AI Security Startups Map — Agentic AI Vendors by CategoryPrompt Security · undated page, accessed October 27, 2026 · Tier A
  8. [8]About this Map & Methodology — AI Security Startups MapPrompt Security · undated page, accessed October 27, 2026 · Tier A
  9. [9]OneClaw DashboardPrompt Security · undated page, accessed November 10, 2026 · Tier A
  10. [10]Prompt Security Pros and Cons | User Likes & DislikesG2 · undated page, accessed November 10, 2026 · Tier C

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