CISO Tribune

Vendor comparison · 2 companies

42Crunch vs Fleuret AI

42Crunch sells a platform for governing the security of MCP servers, APIs and AI agents at enterprise scale. 42Crunch says it helps enterprises bring AI security under control. 42Crunch describes the job as discovering every MCP server that AI agents expose or consume, securing each one against attack, and assessing compliance with AI regulations and security frameworks. Fleuret AI sells pentesting that combines artificial intelligence and offensive expertise. CISO Tribune files both under Dynamic application security testing. 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.

Change the companies

Up to four companies side by side.

  • 42Crunch
  • Fleuret AI
42Crunch vs Fleuret AI: Products, Customers and Funding Compared
42Crunch42Crunch sells a platform for governing the security of MCP servers, APIs and AI agents at enterprise scale. 42Crunch says it helps enterprises bring AI security under control. 42Crunch describes the job as discovering every MCP server that AI agents expose or consume, securing each one against attack, and assessing compliance with AI regulations and security frameworks.42crunch.comFleuret AIFleuret AI sells pentesting that combines artificial intelligence and offensive expertise.fleuret.ai
What it sells
  • AI Regulatory Compliance[5]Evaluates every MCP server against regulatory and industry frameworks. Maps each finding to the control it breaches.
  • Émile[4][6]Runs pentests on applications, APIs and infrastructure and ships a replayable exploit with every finding.
  • Hortense[4][5][6]Tells customers what to test next, and when.
Categories
Headquarters
London, United KingdomNot stated on its pages
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Not stated on its pagesPrivately held
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • September 23, 202642Crunch announced the general availability of its MCP Security Governance solution.[8]
  • January 19, 202642Crunch announced the availability of API Contract Generator in developer IDEs.[9]
  • October 5, 2026Fleuret AI closed a €4M pre-seed round led by RAISE Ventures, with participation from Auriga Cyber Ventures, Wind Capital and Better Angle.[2]
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
Who it fits
From its own pages, 42Crunch sells mainly to enterprise security and platform teams that govern MCP servers, APIs and AI agent security at scale. Its pricing is sized to the number of APIs, MCP servers and users in an organization. Individual developers who use its AI coding agent plugins have a separate self-serve pricing option.Its published guides address CISOs at credit institutions and at SaaS companies. Fleuret describes its service as adding to the people already in place, such as a customer's team, MSSP or PASSI-certified firm. Its reports are signed and mapped to DORA, NIS2 and ISO 27001. Hosting and inference run on Scaleway in Paris.
Last verified
November 9, 2026October 21, 2026

Where they overlap

  • 42Crunch and Fleuret AI are both filed under Dynamic application security testing.

Where they differ, field by field

  • 42Crunch's primary category is API security; Fleuret AI's is Breach simulation and automated pen-testing.
  • 42Crunch is also filed under AI model and agent security. Fleuret AI is also filed under Penetration testing and red team services and Static application security testing.
  • 42Crunch lists AI Regulatory Compliance. Fleuret AI lists Émile and Hortense.
  • 42Crunch is headquartered in London, United Kingdom.
  • Fleuret AI is privately held.

What it sells: 42Crunch

What AI Regulatory Compliance does[5]
42Crunch continuously evaluates every MCP server against the regulatory and industry frameworks an organization answers to. It maps each finding to the specific control it breaches. The page says compliance posture is computed by the control on every audit and every scan, not assembled from documents afterward. Its headline refers to real-time compliance reporting mapped to five frameworks.

What it sells: Fleuret AI

What Émile does[4][6]
A separate validator confirms every finding with a non-destructive exploit. Every finding ships with a working, replayable exploit. Each finding lands as a ticket with its exploit, an owner and a remediation, pushed to Jira, Linear or Slack.
What Hortense does[4][5][6]
Hortense maps a customer's estate from domain to database. Hortense crosses what changed in the code with what is exposed on the internet and what past pentests found. Hortense prepares the scope, and a person with launch rights starts the pentest, which Émile runs. Hortense comes with every yearly plan.

Questions about 42Crunch and Fleuret AI

What do 42Crunch and Fleuret AI sell?
42Crunch sells AI Regulatory Compliance. Fleuret AI sells Émile and Hortense.
Are 42Crunch and Fleuret AI in the same category?
They share Dynamic application security testing. 42Crunch's primary category is API security and Fleuret AI's is Breach simulation and automated pen-testing.
Where are 42Crunch and Fleuret AI headquartered?
42Crunch is headquartered in London, United Kingdom.
Who owns 42Crunch and Fleuret AI?
Fleuret AI is privately held.
Who are 42Crunch and Fleuret AI sold to?
From its own pages, 42Crunch sells mainly to enterprise security and platform teams that govern MCP servers, APIs and AI agent security at scale. Its published guides address CISOs at credit institutions and at SaaS companies.
What have 42Crunch and Fleuret AI announced recently?
September 23, 2026: 42Crunch announced the general availability of its MCP Security Governance solution. October 5, 2026: Fleuret AI closed a €4M pre-seed round led by RAISE Ventures, with participation from Auriga Cyber Ventures, Wind Capital and Better Angle.

About 42Crunch

42Crunch sells a platform for governing the security of MCP servers, APIs and AI agents at enterprise scale. 42Crunch says it helps enterprises bring AI security under control. 42Crunch describes the job as discovering every MCP server that AI agents expose or consume, securing each one against attack, and assessing compliance with AI regulations and security frameworks.[4][10]

42Crunch says AI coding agents ship MCP servers faster than any manual inventory process can track. 42Crunch discovers every MCP server across an organization automatically, both sanctioned and shadow alike, audits each one and ranks it by risk. 42Crunch says every request from an AI agent passes through the MCP server before it ever reaches an enterprise system or the API behind it. 42Crunch also says an MCP tool is only as secure as the API it wraps.[4]

42Crunch says its deterministic contract-driven model applies equally to the MCP and API layer. Every MCP server and every API behind it gets a machine-readable contract of its declared surface. In the 42Crunch model, discovery writes the contract, testing measures against it, and runtime enforces it. 42Crunch says the model it uses to secure APIs now extends to the MCP servers AI agents call and expose.[4][6]

On the MCP side, 42Crunch sweeps registries, gateways and repos to surface the shadow servers agents are already calling, then reads each server's advertised tools, resources and prompts and emits a contract. Every finding carries severity, evidence and the fix. 42Crunch fails the build when a server leaves its approved contract, then keeps watching the one in production for new tools, rewritten descriptions and widened permissions.[4]

Tests are generated from the OpenAPI definition and run in the pipeline, covering broken object-level authorization, broken auth, mass assignment and unrestricted resource consumption. All AI generated code is automatically fixed by 42Crunch. For runtime, 42Crunch describes a positive-security firewall assembled from the contract itself, where unknown paths, extra parameters, malformed payloads and over-sharing responses are rejected before they reach the backend.[4]

For compliance, 42Crunch says the EU AI Act, ISO 42001, NIST AI RMF, CSA AICM and OWASP are all tagged automatically on every audit. A security review doubles as compliance evidence without extra work. Each finding arrives already tied to the control it answers, so the audit trail for an AI estate is a by-product of the scan. 42Crunch computes compliance posture control by control on every audit and every scan, not assembled from documents afterward. Each audit and scan checks a server against all applicable frameworks at the same time.[4][5][11]

A server below the threshold does not reach production.[12]

42Crunch is built for enterprise security and platform teams governing MCP servers, APIs and AI agent security at scale. 42Crunch pairs API Audit, Scan and Protection with MCP Contract, Audit, Scan and Protect on one platform, with one set of SQG policies and one CI/CD pattern. Pricing includes a dedicated encrypted tenant, SSO and a dedicated support manager, sized to the number of APIs, MCP servers and users. Individual developers who use the 42Crunch AI coding agent plugins have a self-serve pricing option.[2][3][4][5][6][7][10][12]

42Crunch on the record

Sources

42Crunch full record

  1. [1]42crunch criticalblue announce partnership42Crunch · 42crunch.com · published November 21, 2018 · Tier A
  2. [2]42crunch.com42Crunch · 42crunch.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]42crunch publishes state of api security 202642Crunch · 42crunch.com · published February 11, 2026 · Tier A
  4. [4]42Crunch — AI Security Platform for MCP42Crunch · undated page, accessed October 23, 2026 · Tier A
  5. [5]AI Regulatory Compliance | 42Crunch42Crunch · undated page, accessed October 23, 2026 · Tier A
  6. [6]Management der MCP-Server-Sicherheitslage | 42Crunch42Crunch · undated page, accessed October 23, 2026 · Tier A
  7. [7]About 42Crunch42Crunch · undated page, accessed October 23, 2026 · Tier A
  8. [8]42Crunch Launches MCP Security Governance, Giving Enterprises Detailed AI Exposure Management and Compliance with AI Regulatory Frameworks42Crunch · published September 23, 2026 · Tier A
  9. [9]42Crunch Launches API Contract Generator in Developer IDEs42Crunch · published January 19, 2026 · Tier A
  10. [10]Pricing | 42Crunch42Crunch · undated page, accessed November 4, 2026 · Tier A
  11. [11]KI-Regulierungskonformität | 42Crunch42Crunch · undated page, accessed November 4, 2026 · Tier A
  12. [12]Management der MCP-Server-Sicherheitslage | 42Crunch42Crunch · undated page, accessed November 4, 2026 · Tier A

Fleuret AI full record

  1. [1]fleuret.aiFleuret AI · fleuret.ai · undated page, accessed October 21, 2026 · Tier A
  2. [2]Fleuret raises €4M pre-seed for agentic pentestingFleuret AI · published October 5, 2026 · Tier A
  3. [3]About Fleuret | Agentic AI pentestingFleuret AI · undated page, accessed November 10, 2026 · Tier A
  4. [4]Fleuret | AI-powered automated pentestingFleuret AI · undated page, accessed November 10, 2026 · Tier A
  5. [5]Pricing | Pentest credits, platform included | FleuretFleuret AI · undated page, accessed November 10, 2026 · Tier A
  6. [6]Hortense, your offsec brain | Know what to test next, and when | FleuretFleuret AI · undated page, accessed November 10, 2026 · Tier A
  7. [7]SOC 2 and ISO 27001 cost calculator | FleuretFleuret AI · undated page, accessed November 10, 2026 · Tier A
  8. [8]Security Policy | FleuretFleuret AI · published March 11, 2026 · Tier A
  9. [9]Compliance Pentest Guides | DORA, NIS2, ISO 27001 | FleuretFleuret AI · undated page, accessed November 10, 2026 · Tier A

Spot a factual error? Request a correction.