Litera brings document comparison and Firm AI Search into Microsoft Copilot for legal

Nov 10, 2026
Litera Compare and Firm AI Search now work as plugins in Microsoft Copilot for legal, giving lawyers deterministic redlines and permission-aware firm search in plain language.

Litera is bringing Litera Compare and Firm AI Search to Microsoft Copilot for legal, the company said on 10 November. The plugins let legal professionals compare document versions and search their firms' experience records through Copilot.

Litera Compare uses the company's deterministic comparison engine to identify changes in Word, Excel, PowerPoint, PDF and other files. Copilot returns a link to the resulting redline and can then help summarize changes, identify possible risks and prepare responses.

Firm AI Search connects Copilot with information from Litera Foundation, matter systems and expertise databases. It provides cited answers based on records that each user is permitted to access, while respecting ethical walls and other access controls.

Microsoft says partner plugins are rolling out through its plugin registry over time. Litera has also adopted Microsoft 365 E7, the Frontier Suite, which it says is separate from customer eligibility for the plugins.

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