Canadian lawyers turn to AI for first-pass review of complex cases

- October 7, 2026

McCarthy Tétrault, one of Canada’s largest business law firms, has deployed Altorney’s MARC document intelligence platform to support document review across litigation, investigations, antitrust, tax, and data breach matters.

The deployment gives the firm’s legal teams an AI-powered system for analyzing large document collections and identifying information related to relevance, privilege, personal information, confidential information, and other matter-specific categories.

McCarthy Tétrault has more than 800 lawyers and is using MARC through its e-discovery division, MT>3. The technology is currently being applied to relevance and privilege analysis, issue coding, and the identification of personal and confidential information.

MARC is designed to analyze documents before they enter a review platform or work with data that is already hosted in one. The approach allows legal teams to identify potentially irrelevant material earlier in the process while also supporting quality-control workflows during document review.

The platform also provides a rationale for its classifications, allowing lawyers to assess the reasoning behind an AI-generated result.

  • “We are using MARC for relevance and privilege review, issue coding, identification of personal and confidential information across general litigation, investigations, and data breach matters,” said Susan Wortzman, partner at McCarthy Tétrault and president of MT>3.

According to Altorney, the technology can be deployed in a client’s cloud, a client-controlled data center, or Altorney’s secure hosted environment. McCarthy Tétrault has been using MARC within its own private environment.

For the law firm, the technology is being positioned as a way to reduce the amount of manual work involved in processing large document sets while leaving final legal analysis to lawyers.

“MARC provides detailed rationale for every coding decision, making it easy for lawyers to validate its accuracy and spend their time applying complex legal judgment,” Wortzman said.

The deployment comes as legal organizations increasingly experiment with AI for document-heavy processes, where reviewing large volumes of information can consume significant amounts of time and resources.

Founded in 2021, Altorney develops legal technology for litigation, investigations, transactions, compliance, privacy requests, and data breach response. MARC is its document intelligence platform.