In short
How they differ.
Worked out from the makers' own pages, read Oct 20, 2026. Prices change; check before you pay.
- Both have a free plan.
- Microsoft Copilot also has a computer app.
- Muse shipped an update more recently (Sep 8, 2026).
Side by side
The details.
| Muse | Microsoft Copilot | |
|---|---|---|
| Made by | Meta · United States | Microsoft · United States |
| What it says it is | “Muse is a secure, private personal AI agent that proactively helps people meet their goals and suggests ideas.” | “Copilot is the AI for work, helping you create, research, analyze, and get things done in the Microsoft 365 apps you use every day.1” |
| Free plan | Yes"It's free for most of what people need, with subscription plans for people who want to do more." Limits not stated. | Yes"Limited usage with a free Microsoft account"; Microsoft 365 plans give "higher usage than free" or "extensive usage". |
| Plans | Free: freeSubscription plans: not in US$ | Free (Microsoft account): freeMicrosoft 365 Personal: $9.99 a monthMicrosoft 365 Family: $12.99 a monthMicrosoft 365 Premium: $19.99 a month |
| Runs on | iOS, Android, web (muse.ai), WhatsApp | web, desktop, mobile |
| Latest update | Introducing Muse: The World’s First Personal AI Agent Built for Everyone, Sep 8, 2026 | Updated Microsoft Copilot app for web, desktop, and mobile available, Aug 18, 2026 |
| Its terms | “You decide whether we can use your interactions with Muse to develop and improve our AI models.”What it does with your data · Meta Help Center: How Muse handles your privacy, safety and security | “If you are logged into Copilot with a Microsoft Account or other third-party authentication, you can control whether your conversation activity is used for training Microsoft's generative AI models.”What it does with your data · Microsoft Support: Privacy FAQ for Microsoft Copilot |
| Disputes | None on file | None on file |
| Sources | Prices, Sep 8, 2026 · Description · company-reported | Prices, Oct 20, 2026 · Description · company-reported |
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