CISO Tribune

Vendor comparison · 2 companies

Plerion vs Prompt Security

Plerion calls Pleri its primary AI security agent. 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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  • Plerion
  • Prompt Security
Plerion vs Prompt Security: Products, Customers and Funding Compared
PlerionPlerion calls Pleri its primary AI security agent.plerion.comPrompt SecurityPrompt Security offers protection for both employee use of AI tools and the apps an organization builds.prompt.security
What it sells
  • Prompt Fuzzer[4]An open source tool for AI vulnerability assessment.
Categories
Headquarters
Not stated on its pagesNot stated on its pages
Founded
Not stated on its pages2023[1]
Ownership and funding
Not stated on its pagesOwned 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, the company sells mainly to organisations with cloud environments, saying its autonomous agents investigate your cloud and map what actually needs fixing. It also lists delivery partnerships for MSPs, MSSPs, and consultancies, so service providers are a stated audience. It publishes cloud security reference articles on controls and frameworks as well.Not written yet
Last verified
September 27, 2026September 27, 2026

Where they overlap

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

Where they differ, field by field

  • Plerion's primary category is Cloud-native application protection (CNAPP); Prompt Security's is AI firewalls and guardrails.
  • Plerion is also filed under Cloud workload protection. Prompt Security is also filed under Workforce AI usage security.
  • Plerion lists Pleri and Plerion Platform. Prompt Security lists Prompt Fuzzer.
  • Prompt Security was founded in 2023.
  • Prompt Security is owned by SentinelOne, since 2025.

What it sells: Plerion

What Plerion Platform does[2]
The Plerion Platform maps every cloud asset, identity, permission, and workload into a single graph. The Plerion Platform reads that graph the way an attacker would.

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 Plerion and Prompt Security

What do Plerion and Prompt Security sell?
Plerion sells Pleri and Plerion Platform. Prompt Security sells Prompt Fuzzer.
Are Plerion and Prompt Security in the same category?
They share AI model and agent security. Plerion's primary category is Cloud-native application protection (CNAPP) and Prompt Security's is AI firewalls and guardrails.
When were Plerion and Prompt Security founded?
Prompt Security was founded in 2023.
Who owns Plerion and Prompt Security?
Prompt Security is owned by SentinelOne, since 2025.
Who are Plerion and Prompt Security sold to?
From its own pages, the company sells mainly to organisations with cloud environments, saying its autonomous agents investigate your cloud and map what actually needs fixing.

About Plerion

Plerion calls Pleri its primary AI security agent.[2]

Plerion addresses a backlog that no security team works through manually once ten developers use AI coding assistants. Plerion describes a finding that spans a service, a team, and a vendor, and that nobody picks up because nobody is sure whose job it is. Plerion states that 46% of code shipped today is AI-generated, while the list of issues that took a week to triage is still taking a week.[2]

Plerion shows what agents can access and what they can do. Plerion traces each agent to the code, identities, infrastructure, and data it touches, so that teams can fix the risks that matter.[2]

Plerion's agent investigates findings, decides whether they need dealing with, and submits a fix. The engineer who owns the resource reviews and approves the change.[2][3]

Pleri orchestrates a set of specialist skills, each covering a different part of the cloud estate.[2]

Plerion publishes an article based on the AIS-05 control from the CSA Cloud Controls Matrix v4.0.10, dated 2023-09-26. Plerion's article on automated application security testing covers considerations, strategies, and practices for implementing that testing based on guidance in the Cloud Controls Matrix of the Cloud Security Alliance.[2][4][6]

Plerion's data security guidance notes that the DSP-01 control maps to several other industry standards and regulations related to data privacy and security.[1][2][3][4][5][7][8][9][10][11][12][13][14]

Plerion on the record

Sources

Plerion full record

  1. [1]plerion.comPlerion · plerion.com · undated page, accessed September 27, 2026 · Tier A
  2. [2]PlerionPlerion · undated page, accessed October 27, 2026 · Tier A
  3. [3]Privacy Policy | PlerionPlerion · published June 12, 2026 · Tier A
  4. [4]Application and Interface Security Policy and Procedures | PlerionPlerion · published July 15, 2025 · Tier A
  5. [5]Application Security Baseline Requirements | PlerionPlerion · published July 15, 2025 · Tier A
  6. [6]Automated Application Security Testing | PlerionPlerion · undated page, accessed November 10, 2026 · Tier A
  7. [7]Application Security Metrics | Plerion | PlerionPlerion · undated page, accessed November 10, 2026 · Tier A
  8. [8]Application and Service Approval | PlerionPlerion · undated page, accessed November 10, 2026 · Tier A
  9. [9]Data Security and Privacy Policy and Procedures | PlerionPlerion · undated page, accessed November 10, 2026 · Tier A
  10. [10]Compliance User Responsibility | PlerionPlerion · undated page, accessed November 10, 2026 · Tier A
  11. [11]Business Continuity Planning | Plerion | PlerionPlerion · undated page, accessed November 10, 2026 · Tier A
  12. [12]Disaster Response Plan | Plerion | PlerionPlerion · undated page, accessed November 10, 2026 · Tier A
  13. [13]Cabling Security | Plerion | PlerionPlerion · undated page, accessed November 10, 2026 · Tier A
  14. [14]Capacity and Resource Planning | PlerionPlerion · undated page, accessed November 10, 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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