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PyRIT

Microsoft’s open-source red teaming framework for generative AI

Automated platformAgents and toolsOpen source

PyRIT, built by the Microsoft AI Red Team, finds security and safety weaknesses in generative AI through automated scans, adaptive multi-turn attacks such as Crescendo, and human-led testing. It ships a CLI scanner, the CoPyRIT GUI and a Python framework, and reached v1.0.0 in Jul 2026. Microsoft Foundry’s AI Red Teaming Agent is built on its attack strategies.

Best for: Security teams that want to script their own multi-turn attacks.

Open source (MIT), maintained by the Microsoft AI Red Team

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

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

1 Legal namePyRIT (Python Risk Identification Tool for generative AI)
2 HeadquartersNot disclosed
3 Founded2024
4 TeamNot disclosed
5 What they testLLM apps, Agents and tool use, Multimodal, Prompt injection and jailbreaks, Data leakage, Bias and harms
6 FrameworksNot disclosed
7 CertificationsNot disclosed
8 Published pricesFree (MIT). Microsoft Foundry’s managed AI Red Teaming Agent is billed as an Azure service.
9 Customers and partnersNot disclosed

Where we recommend them

Worth knowing before you sign

  • Old Azure/PyRIT links point to an archived stub; use microsoft/PyRIT.
  • General availability of the Foundry AI Red Teaming Agent is not confirmed.

Go to PyRIT's site

Sources

  1. GitHub: microsoft/PyRIT
  2. GitHub: releases
  3. arXiv: PyRIT paper
  4. Microsoft Learn: AI Red Teaming Agent

Work at PyRIT? Send corrections with a source to editors@bestairedteamingcompanies.com. We fix verified errors within five business days.

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