Litera Brings Document Comparison and Firm AI Search to Microsoft Copilot for Legal

Following its recent announcement as a Microsoft Copilot for legal launch partner, Litera delivers deterministic document comparison and firm intelligence capabilities within the platform

CHICAGO--(BUSINESS WIRE)--Litera, a Legal AI platform provider that best unifies the practice and business of law, announced Litera Compare and Firm AI Search are now available inside Microsoft Copilot for legal through plugins, bringing 30 years of deterministic document comparison accuracy and firm intelligence into the environment where lawyers work. Alongside this integration, Litera has adopted Microsoft 365 E7, the Frontier Suite, gaining access to the most advanced tier of Microsoft's enterprise AI stack to accelerate how new capabilities reach firms and in-house teams.

“Law firms and corporate legal departments are increasingly making Copilot their productivity standard,” said Joey Benedek, Senior Vice President of Product Management, Litera. “This integration brings legal intelligence into that same environment. Compare delivers the deterministic accuracy that high-stakes legal work demands, and Firm AI Search turns disconnected firm knowledge into cited, permissions-aware answers at the moment they matter most. Together, they bring the practice and business of law into a single experience. And with our adoption of the E7 Frontier Suite, we are accelerating how quickly new capabilities reach the firms and in-house teams that depend on us."

General-purpose LLMs were never built for the precision that legal document comparison demands. Litera Compare is powered by a proprietary algorithm that is more accurate than general-purpose LLMs, delivering deterministic results that catch every change across Microsoft Word, Excel, PowerPoint, PDF, and more. Because the redline is deterministic, any AI layered on top of it is working from a verified output rather than a probabilistic guess. Lawyers can use Copilot to summarize the redline, identify risk, craft mitigation strategies, and more, with the confidence that the underlying comparison is accurate.

Most firm knowledge lives across disconnected systems: matter databases, CRM platforms, expertise profiles, and experience records. When a lawyer needs to find the right colleague or relevant experience for a pitch, they are left searching multiple tools or relying on who they happen to know. Firm AI Search connects that data into a single conversational interface with cited answers that respect ethical walls and access permissions.

With the plugin, lawyers can interact with both capabilities in plain language directly inside Copilot. A lawyer reviewing a contract can ask, “Compare this draft against the version the counterparty sent back,” and Copilot calls on Litera’s comparison engine to generate a legal-grade redline. Preparing for a pitch, that same lawyer can ask, “Who in our firm has handled cross-border M&A work for pharmaceutical companies in Germany?” and Firm AI Search queries across Litera Foundation, matter systems, and expertise databases.

“Microsoft Copilot is designed to be the AI layer where legal professionals work, and that means bringing the best domain-specific intelligence into the experience,” said Carina Negreanu, Partner Director, Science & Verticals at Microsoft. “Litera’s integration of Compare and Firm AI Search through plugins is a strong example of how partners with deep industry expertise can extend Copilot’s value for legal professionals.”

For more information, visit: https://www.litera.com/blog/litera-compare-firm-ai-search-copilot-for-legal