TL;DR: Microsoft Copilot is the right pick if your workday lives inside Word, Excel, Outlook, and Teams — it’s woven into the Microsoft 365 apps and paid tiers can ground answers in your actual work data. Muse (Meta’s personal AI agent) is the pick if you want an assistant that actually does things: it runs tasks in its own secure cloud computer — shopping, booking, scheduling — with a genuinely free tier. These aren’t the same kind of product: Copilot is a work copilot, Muse is an errand-running agent.
Microsoft Copilot vs Muse at a glance
| Microsoft Copilot | Muse (Meta) | |
|---|---|---|
| Core idea | AI assistant inside Microsoft 365 apps | Personal AI agent that completes tasks |
| Free tier | Yes — Copilot Chat, capacity-limited | Yes — free with weekly usage allowance |
| Consumer paid tier | Microsoft 365 Premium, $19.99/mo (replaces Copilot Pro) | Power plan, $20/mo |
| Business paid tier | $30/user/mo (Enterprise); $21/user/mo (Business) | Maximum plan, $100/mo |
| Works inside Word/Excel/Outlook | Yes (paid tiers) | No |
| Grounds answers in your work files | Yes — mailbox, SharePoint, Teams, OneDrive | Limited |
| Completes real tasks (books, shops, schedules) | Limited | Yes — own secure browser, approvals for payments |
| Platforms | Web, Windows, mobile, inside M365 apps | iOS, Android, web, Mac app, WhatsApp (US + Canada) |
| Winner for | Office workers on Microsoft 365 | Anyone who wants an agent that gets things done |
What Microsoft Copilot actually is (and costs)
Microsoft Copilot comes in layers, and the layering matters. The free Copilot Chat is a web and mobile AI chat — fine for quick questions, with commercial data protection for business users, but it can’t see your work files. The old $20/mo Copilot Pro was retired for new customers in 2026; consumers now get fuller Copilot access through Microsoft 365 Premium at $19.99/mo, which bundles the Office apps with heavier Copilot usage.
For businesses, Microsoft 365 Copilot runs $30 per user per month at the enterprise level (on top of an E3/E5 base license) or $21/user/mo for the Business plan aimed at smaller teams up to 300 users. That’s where Copilot’s real trick lives: it grounds answers in your tenant data — your mailbox, SharePoint files, Teams chats, OneDrive — so “summarize the thread about the Q3 forecast” actually works. There’s also Copilot Studio (from $200/mo per tenant) for building custom agents on your company data.
What Muse actually is (and costs)
Muse, announced by Meta in September 2026, is a different animal: a task-executing personal AI agent, not a chatbot. You tell it what you want done — book a flight, reorder something, schedule an appointment — and it carries it out in a dedicated cloud computer Meta calls the Muse Secure VM, using its own secure browser. A separate Sentinel agent approves anything sent to the internet, and sensitive actions like payments or emails require your approval first.
It’s free with a weekly usage allowance, with paid tiers at $20/mo (Power) and $100/mo (Maximum) for heavier use. Commerce integrations include PayPal, Stripe Link, and Expedia, with Shopify/Shop Pay on the way. It’s available in the US and Canada on iOS, Android, the web, a Mac app, and WhatsApp — but no Windows app.
Which should you pick?
Pick Microsoft Copilot if: you already pay for Microsoft 365, your work happens in Word, Excel, Outlook, and Teams, and you want AI that can see your work files and drafts. The value proposition is simple — it meets you where you already work.
Pick Muse if: you want an assistant that completes real-world tasks end to end, you like the idea of a genuinely free AI agent, or you do most of your personal organizing on your phone. It’s the stronger “get it done for me” tool.
Use both if: you’re a Microsoft 365 user who also wants an errand-runner for personal life. They barely overlap — Copilot is your office copilot, Muse is your personal agent.
Frequently asked questions
Is Muse really free?
Yes — Muse has a free tier with a weekly usage allowance. Paid tiers ($20/mo and $100/mo) raise the ceiling for heavy users.
Does Microsoft Copilot work outside Microsoft apps?
The free Copilot Chat works on the web and mobile like any AI chatbot. But Copilot’s distinctive features — drafting in Word, analyzing spreadsheets, summarizing Teams meetings — require the paid Microsoft 365 tiers.
Can Muse actually buy things for me?
Yes, with guardrails: it can shop and book through integrations like PayPal, Stripe Link, and Expedia, and sensitive actions like payments require your explicit approval before it proceeds.
Is Muse the same as the Muse sleep headband?
No. Meta’s Muse is an AI assistant. The Muse S headband for sleep and meditation is a separate product by a different company (InteraXon).
Research-based comparison. No hands-on testing claimed. Prices and features checked October 7, 2026 — verify on microsoft.com and meta.com before buying, as plans change.