Microsoft Copilot and Claude are both AI assistants aimed at business users, but they take very different approaches. Copilot is built into Microsoft 365 and works inside the tools you already use. Claude is a standalone AI assistant that works with anything. Here’s how they compare.
What is Microsoft Copilot?
Microsoft Copilot is an AI assistant built into Microsoft 365 — Word, Excel, Outlook, Teams, PowerPoint and the rest. It’s powered by a combination of OpenAI’s models and Microsoft’s own technology. There are several versions:
- Copilot (free) — available in Windows 11, Bing, and the Edge browser. Powered by GPT-4.
- Microsoft 365 Copilot — the full integration into Word, Excel, Outlook and Teams. Requires a Microsoft 365 Business subscription plus an additional £25/user/month.
- Copilot for GitHub — code completion and suggestions in VS Code and other editors.
Head-to-Head Comparison
| Feature | Claude | Microsoft Copilot (M365) |
|---|---|---|
| Microsoft 365 integration | None (works alongside) | Native — Word, Excel, Outlook, Teams |
| Works in any app | Yes — browser and API | Mainly within M365 |
| Writing quality | Excellent | Good |
| Excel data analysis | Good (paste data in) | Excellent (native in Excel) |
| Email drafting | Good (copy/paste) | Excellent (works inside Outlook) |
| Meeting summaries | Good (paste transcript) | Excellent (live in Teams) |
| Code completion | Via Claude Code | GitHub Copilot (separate) |
| Price | Free / $20/mo Pro | £25/user/month (on top of M365) |
Where Copilot Wins
Native Microsoft 365 integration is Copilot’s biggest advantage — and it’s a real one. Being able to ask “summarise this email thread and draft a reply” directly inside Outlook, or “create a chart from this data” inside Excel, without copying and pasting anything, saves time on tasks you do repeatedly.
The Teams integration is particularly strong: Copilot can join meetings, take notes, and produce a summary with action points automatically.
Where Claude Wins
Flexibility — Claude works with any document, tool, or workflow, not just Microsoft’s ecosystem. If you use Google Workspace, Notion, or any other platform, Claude slots in via the browser.
Writing quality — for longer, more nuanced writing tasks, Claude’s output consistently requires less editing.
Cost — Claude Pro at $20/month is significantly cheaper than M365 Copilot’s £25/user/month. For individuals or small teams, the cost difference matters.
Complex reasoning — Claude Opus handles multi-step analysis and detailed instructions better than Copilot in most scenarios.
Which Should You Use?
Choose Microsoft Copilot if: your team lives in Microsoft 365 and you want AI that works natively inside Word, Outlook, Excel and Teams without any workflow changes. The premium cost is justified if those integrations save time daily.
Choose Claude if: you need a flexible AI assistant for varied tasks, you’re not heavily Microsoft-focused, or the cost of M365 Copilot isn’t justifiable for your team size.
Many businesses use both: Copilot for M365 tasks and Claude for writing, research and more complex analysis.
What About the Free Microsoft Copilot?
The free Copilot (in Windows/Edge/Bing) is a solid free AI assistant powered by GPT-4. It’s worth trying alongside Claude’s free tier — both are capable and free to use without commitment.
