NotebookLM

Upload your own documents and ask questions answered only from them, with citations back to the exact passage, plus generated audio summaries of the material.

Assistants & chat Apps

Checked 25 Sep 2026

Open notebooklm.google.com

What you'd use it for

Getting a straight answer out of a stack of your own documents, with a citation to the exact passage, instead of a confident guess pulled from general knowledge.

Ask a question across dozens of uploaded documents and get an answer with a citation to the source passage
Turn a set of reports or contracts into a two-host audio conversation you can listen to instead of reading
Generate a study guide, FAQ, briefing document or timeline automatically from the sources in a notebook
Have it say plainly when your documents do not contain the answer, rather than filling the gap from general knowledge
Share a notebook so a team is working from the same grounded set of sources

The verdict

NotebookLM earns trust by refusing to answer outside its sources, which is exactly what makes it useful for contract review, research synthesis and handover, where being right about what is actually written matters more than breadth of knowledge. Every source goes in by hand and every answer comes out by hand — there is no connection to your other systems and nothing runs unattended. Paying for more of it means subscribing to a whole Google AI plan, storage and all, rather than buying more NotebookLM on its own. For most people the free tier already does the job, and that is the honest recommendation.

What it costs

Tier	Price	For	Includes
Free	$0/month with a Google Account	Anyone wanting grounded answers from their own documents.	Notebooks, source uploads, chat grounded in those sources, audio overviews, at standard limits.
Google AI Plus	$4.99 USD/month	Regular use that runs into the free notebook and source limits.	More Gemini Notebook features and 2x the usage limits of Free across the Gemini apps, plus 400 GB storage.
Google AI Pro	$19.99 USD/month	Heavy document work as a core part of the job.	Higher Gemini Notebook limits, 4x the usage limits of Free, higher Gemini 3 Pro and Deep Search access, 5 TB storage.
Google AI Ultra	Starting at $99.99 USD/month	The heaviest research and creative use.	Up to 20x the usage limits of Free, plus the full Google AI feature set.

Read from NotebookLM's own pricing page on 25 Sep 2026. Vendors change prices without notice.

What you need to start

A Google account, personal or a work/school account with the feature enabled by the admin
Nothing else for the free tier — no credit card

A few minutes to a working notebook — sign in, upload a document, and wait for it to finish processing before asking the first question.

Your first run Sign in with a Google account, create a notebook, and upload one document. Processing takes a couple of minutes, after which you can ask your first question and get a cited answer, or generate an audio overview — a further few minutes for a two-host discussion of up to about 15 minutes.

Where it breaks

NotebookLM has no pricing page of its own — the paid tiers are the Google AI plans, bundled with Google One storage and the rest of the Gemini feature set, so you cannot buy more NotebookLM without buying all of it. Google prices those plans in local currency at different figures per country; the numbers above are the US rates, and Google will show you a different figure if it geo-detects you elsewhere. Google also renamed the product inside its own pricing pages, which makes matching a tier to a feature list harder than it should be.

Browser and mobile apps. Sources are capped at 500,000 words or 200MB per uploaded file. NotebookLM has been folded into Google's wider AI product line and now appears in Google's own pricing material as Gemini Notebook.

First entry in this reference. There is no previous check to compare it against.

When not to use it

Not for anyone who wants an assistant that connects to their systems and keeps working unattended — there is no automation surface here, only a notebook you feed and read by hand. Not for general knowledge questions either — if the answer is not in the documents you uploaded, it says so rather than guessing, which is the whole point but also the whole limit.

Every other assistant in this category will answer from whatever it knows. This one will only answer from what you gave it, and that single restriction changes what the output is worth.

Put twelve supplier contracts in a notebook and ask which ones auto-renew. The answer comes back with the clause it read and the document it came from. If the answer is not in your documents, it says so, rather than producing something plausible from general knowledge. For anyone who has been burned by a confident wrong answer, that is the whole pitch.

What it is genuinely good for

Contracts, policies and manuals — a set of documents too long to reread and too important to skim.
Research you have already gathered — reports, transcripts, notes, turned into something you can interrogate.
Handover — the audio overviews are a surprisingly effective way to get someone across a body of material on a drive.

Where it stops

You upload the sources by hand, every time, and you copy the answer out by hand. There is no connection to your systems and nothing happens unattended. That is also the reason it is trustworthy — the boundary of what it can see is a boundary you drew.

The paid tiers are not sold separately. Paying for more NotebookLM means subscribing to a Google Gemini plan and getting the storage and the rest of the suite along with it. For most people the free tier is enough, and that is the honest recommendation.