Microsoft Word Add-in

The AI legal assistant,
native to Word.

Redlining, playbook-driven review, and document chat, all as a sidebar inside Microsoft Word. No app switching.

Word DesktopWord OnlineMac & WindowsLitera compatible

Three tools, one sidebar

Everything you need
to review contracts faster.

01 · Review & Redline

AI edits that appear as Track Changes.

Ask mixus to redline your document and every suggestion appears as a native Microsoft Word Track Change, attributed to “mixus AI”. Review, accept, or dismiss each one individually, or accept all with one click.

  • Red strikethrough for removed text, green for additions
  • Accept or dismiss each suggestion one by one
  • Fully compatible with Litera Compare and iManage
  • Standard Word Track Changes, no extra software for reviewers
02 · Playbooks

Your firm’s review checklist, automated.

Playbooks turn your standard review guidelines into one-click automated reviews. Run your NDA playbook, SaaS agreement, MSA, or any custom playbook you’ve built and get structured Track Changes back instantly.

  • NDA, SaaS, MSA, employment, and custom playbooks
  • Every suggestion traces back to a specific playbook rule
  • Shared across the organization for consistent reviews every time
  • Acceptance rates & learnings land in firm-level analytics
03 · Prompts

Saved instructions. AI-suggested next steps.

The Prompt Library gives you one-tap access to the instructions you use most. mixus also reads your document and suggests relevant prompts automatically, so you always know what to tackle next.

  • Save your most-used redline and review instructions
  • AI-suggested prompts based on your document’s content
  • Filter by category: NDA, Contract Review, M&A, Employment, Drafting
  • Share custom prompts across your team
Connected to mixus

Start in email.
Continue in Word.

mixus works across email and Word. Pick up wherever’s most convenient, with full context preserved throughout.

01Email the agent

Forward a contract. Get a redline back.

Forward a .docx to your mixus agent email address with instructions. The AI reviews and sends back a redlined draft with Track Changes.

02Receive the redline

A standard .docx lands in your inbox.

AI-suggested changes arrive as standard Track Changes. Open it in Word and your mixus sidebar is ready to continue.

03Iterate in Word

Re-run playbooks, ask follow-ups, refine.

With the add-in open, run further playbooks, ask follow-up questions, or request a second-pass redline.

Built for how firms work

Fits your stack.
Stays inside your controls.

Works with your stack

Fits into your existing workflow.

  • Litera Compare: Track Changes appear exactly as Litera expects
  • iManage: Open documents from iManage, review with mixus, save back
  • Word Desktop: Windows and Mac, Word 2016 or later
  • Word Online: Full feature support in the browser
  • No new software for reviewers: they don’t need a mixus account to see Track Changes
Security & privacy

Your documents stay yours.

  • Documents sent to mixus only when you trigger a review
  • All communication encrypted over HTTPS
  • Track Changes attribution stored in the Word document only
  • Covered by your existing mixus data-processing agreement
  • IT-admin deployment via Microsoft 365 Admin Center
Get Started

Install the add-in.

Open any Word document, and start reviewing with AI.