Muse / Gemini Spark
Both are consumer agents from big platforms, and they bet in opposite directions. Muse meets you inside WhatsApp and costs nothing to start, while Spark stays within Google's own apps and begins at $19.99/month. Neither is offered in the EU or the UK.
Meta's free errand agent that you text like a friend.
Google's round-the-clock agent for people who live in Gmail.
| Difference | Muse | Gemini Spark |
|---|---|---|
| Price | Muse costs nothing for the first 100 million tokens each week, then $20/month or $100/month. | Gemini Spark costs $19.99/month with Google AI Pro in the US, or $99.99/month and up on Google AI Ultra. |
| Where you talk | Muse lives in its own app, on muse.ai, in the Mac app and in WhatsApp. | Gemini Spark lives inside Gmail, Chrome, Photos and the Gemini app, with no chat-app presence. |
| Best tasks | Muse is strongest at shopping, bookings, Marketplace listings and reminders. | Gemini Spark is strongest at scheduled and event-triggered jobs across Gmail, Calendar, Docs and Photos. |
| Data handling | Muse keeps copies of connected data in a dedicated Secure VM, which has already had a reported flaw. | Gemini Spark works with the data already in your Google account and confirms sensitive actions first. |
| Availability | Muse is open to adults in the US and Canada. | Gemini Spark comes via Google AI Pro in the US and Google AI Ultra in most other supported countries, but never in the UK, Switzerland, Nigeria or the EEA. |
Pick Muse if you are a US or Canadian resident and want to hand off errands for free by messaging it in WhatsApp.
Pick Gemini Spark if you want an agent that works with your Gmail, Calendar and Drive from day one, with no connectors to set up.
Capability grid
| Muse | Gemini Spark | |
|---|---|---|
| Keeps working when you close the app | Yes | Yes |
| Messages you first | Yes | Partly |
| Has its own cloud computer | Yes | Yes |
| Lives in chat apps | Partly | No |
| Voice | Partly | Partly |
| Can buy things | Yes | Partly |
| Standing rules you can edit | Partly | Partly |
| Choose any model | No | No |
| Runs on your own machine | No | No |
| Free tier | Yes | No |
| Team and business plans | Partly | Partly |
Muse is the better free starting point for errands and purchases. Spark is the better fit for keeping an inbox and calendar in order, and in most countries outside the US and Canada it is the only one of the two you can get, provided you pay for Ultra.