Grok for Microsoft 365 is xAI's free add-in that drops a conversational AI agent into Excel, Word, and PowerPoint, built for Microsoft 365 users who want analysis and drafting without leaving the document. Launched in stages in June 2026 and expanded to Excel on June 22, it turns plain-English requests into real edits inside the world's most-used office suite.
Core Features
- In Excel, describe a task in plain English and Grok writes the actual formula, sorts ranges, fills cells, and inserts charts automatically.
- Every answer cites the specific cells it read, so you can verify the math instead of trusting a black box.
- In Word it drafts structured documents, shifts tone, and fixes grammar; in PowerPoint it builds a first-draft deck from a topic and slide count.
- Connectors pull context from email, SharePoint, and Google Drive into the current analysis.
- Live X (Twitter) data access surfaces current news and trending topics directly inside the document, something Copilot does not offer natively.
Use Cases
- Finance and ops analysts who need quick "what changed and why" answers from spreadsheet ranges.
- Marketers drafting decks and docs that reference live social trends and recent posts.
- Office users who want a free alternative to Microsoft 365 Copilot at roughly 30 dollars per month.
Pricing
The add-in is free to install from the Microsoft Marketplace, but using it requires a paid xAI plan (X Premium Plus or SuperGrok). That pricing directly undercuts Microsoft 365 Copilot, which runs about 30 dollars per month for comparable features.
Our Take
Best free on-ramp into AI-assisted Office work if you already pay for X or SuperGrok. The trade-off is governance: it is a third-party add-in that can read and send document data, so IT teams should pilot it on synthetic files before broad rollout. More at aifreetool.site/tool-category/ai-office-tools/.
