TL;DR: These tools do opposite jobs. Muse is Meta’s personal AI agent — it browses, fills forms, drafts and sends email with your approval, books, and keeps working in the background on its own secure cloud computer. NotebookLM (now also called Gemini Notebook) does none of that: it only answers from sources you upload, with citations, plus audio and video overviews. Need tasks done → Muse. Need trustworthy answers from your documents → NotebookLM.
Muse vs NotebookLM at a glance
| Feature | Muse | NotebookLM | Edge |
|---|---|---|---|
| What it is | Personal AI agent (Meta) that completes tasks | Source-grounded research notebook (Google) | Different jobs |
| Free plan | Free with a usage limit that refreshes | $0 — 100 notebooks, 50 sources per notebook | NotebookLM limits are clearer |
| Paid entry | Power $20/mo | Plus via Google AI Plus $4.99/mo — 200 notebooks, 100 sources/notebook | NotebookLM cheaper |
| Higher tier | Maximum $100/mo | Pro via Google AI Pro $19.99/mo — 500 notebooks, 300 sources/notebook; Ultra from $99.99/mo | — |
| Knowledge source | The web, your connected apps, email and calendar | Only the PDFs, docs, links and videos you add (up to 500,000 words per source) | Muse broader, NotebookLM more citable |
| Takes action? | Yes — browsing, forms, reservations, purchases via Link, email with approval, background and scheduled work | No — answers, summaries, reports, Audio/Video Overviews, slide decks | Muse |
| Citations | Research summaries; verify important claims | Inline citations tied to your exact sources | NotebookLM |
| Where you use it | Muse app (iOS/Android/Mac), muse.ai, WhatsApp | Browser at notebook.google.com (NotebookLM links redirect) | Muse more places |
Prices checked October 2026. Research-based comparison; no hands-on testing claims. Our full Muse review is at testedintelligence.com/muse-ai-assistant/.
When Muse is the right tool
Ask Muse to compare suppliers, book a table, chase an invoice, or research options and draft the email — then approve the sensitive step. It runs on a persistent Muse Secure VM, a separate cloud computer with its own browser that you can watch and take over, and a Sentinel layer reviews what can leave the machine. Credentials and card details sit in a separate store Muse can use but not read, and checkouts use Link by Stripe one-time card numbers. That architecture matters because an agent that can spend money needs guardrails, not just a chat window.
When NotebookLM is the right tool
NotebookLM’s refusal to improvise is the point. Upload a course pack, contracts, interview transcripts, or research papers, and every answer is grounded in those sources with citations you can check. Audio Overviews turn dense material into a listenable summary, and Deep Research and slide decks build on the same notebook. It will not book anything, email anyone, or answer well about topics you did not feed it — and the free tier is generous enough that most students and researchers should start there before paying for Google AI Pro.
Which should you pick?
Pick Muse if: your bottleneck is doing — errands, bookings, inbox and calendar work, multi-step web tasks you would rather delegate and approve.
Pick NotebookLM if: your bottleneck is knowing — understanding a defined set of documents accurately, studying, or producing cited research you can defend.
Use both if: research in NotebookLM, then hand Muse the follow-up tasks (booking the interview, drafting the outreach) once you trust the findings.
Frequently asked questions
Is Muse free?
Yes, Muse is free within a usage limit. Power costs $20/month and Maximum $100/month for higher capacity for longer or more frequent agent work.
Is NotebookLM free?
Yes. The free plan allows 100 notebooks with 50 sources each. Higher limits come bundled with Google AI plans: Plus at $4.99/month and Pro at $19.99/month.
Can NotebookLM browse the web and book things like Muse?
No. NotebookLM answers only from sources you add (plus its research features) and does not take actions like bookings, purchases, or sending email.
Did NotebookLM change its name?
Google renamed it Gemini Notebook in July 2026; the product, plans, and limits stayed the same, and old NotebookLM links redirect.