NotebookLM is a research tool from Google that only answers using material you give it. Upload PDFs, Google Docs, web pages, or YouTube links, and it responds from those sources alone, with citations that point to the exact line each claim came from. It's built for people working through a lot of reading at once: a student with a term's worth of lecture notes, a researcher with 30 papers, a lawyer with a stack of filings. Google renamed it to Gemini Notebook in July 2026 and wired it deeper into the Gemini ecosystem, but the core idea hasn't changed, and most people still search for it as NotebookLM.
Key Features
- Source-grounded answers: it won't pull from the open web or the model's training data, so it can't wander off-topic or invent a study that doesn't exist. Every claim is footnoted to a passage you can open in one click.
- Audio Overview: turns a notebook into a 10-to-20-minute podcast between two AI hosts, with an interactive mode that lets you interrupt and ask your own questions.
- Studio outputs: one click converts the same sources into a study guide, briefing doc, timeline, mind map, flashcard set, quiz, or slide deck, each with citations.
- Video Overviews: narrated slide-style explainers in 60-plus languages, plus newer cinematic and short-form formats.
- Per-notebook cloud computer: since the 2026 update, a notebook can write and run code to do real data analysis on your sources instead of just summarizing them.
- Free apps for iOS and Android that download Audio Overviews for offline, background listening and hook into the system share sheet, so you can send a webpage or PDF straight into a notebook.
Screenshots
Why You'll Love NotebookLM
Answers you can actually trust
Most AI assistants blend what you asked with whatever the model absorbed in training, and you can't tell where any given sentence came from. NotebookLM flips that. It reads only the sources in the current notebook, and every sentence in its answers carries a small numbered citation that jumps you to the exact paragraph it drew from. When you're checking a claim against a contract, a lab report, or a set of meeting transcripts, that traceability is the whole point. You spend your time verifying the source, not second-guessing the model.
Audio Overview makes a stack of PDFs listenable
Drop six papers into a notebook, click generate, wait a couple of minutes, and you get a conversation between two synthetic hosts who walk through the main ideas, connect them, and occasionally push back on each other. It isn't a replacement for reading the primary material. But as a way to prime yourself before a meeting or review something on a commute, it works better than it has any right to. The interactive mode goes further: you tap in mid-episode and ask the hosts to explain something again or go deeper on a point, and the discussion adapts. Nothing else in this category does that yet.
Where it still comes up short
The design that makes NotebookLM trustworthy also makes it rigid. It won't browse the open web, so if the answer isn't in a source you added, you get nothing. The "Discover sources" search helps a little, but this is not a general research agent. Audio Overviews are impressive the first few times and then the seams show: the hosts oversell everything as fascinating, they repeat themselves, and they sometimes mangle a name or a number. Output quality tracks source quality exactly, so a sloppy PDF gets you a confident summary of sloppy information. And the pricing picture is muddled right now, with the product renamed mid-year and the paid tier folded into bundles that keep shifting.
Plans and Pricing
The core tool is free with any Google account, and the free tier is reasonably generous: up to 100 notebooks, 50 sources per notebook, roughly 50 chat questions a day, and a handful of Audio Overviews and reports daily. Each source can run to about 500,000 words or 200MB. For most coursework and casual research, that's enough.
The paid tier, still branded NotebookLM Plus, is no longer sold on its own to individuals. It comes bundled with Google AI Plus, which dropped to $4.99 a month in the US in June 2026 (down from $7.99) and also includes 400GB of storage and higher limits across the Gemini app. It's part of the pricier Google AI Pro and Ultra plans too. Plus lifts the ceilings well above the free tier, with more notebooks, around 100 sources per notebook, higher daily generation caps, and six Audio Overviews a day, plus notebook sharing with usage analytics, chat response customization, and early access to new features. Google doesn't publish a clean side-by-side limits table, and the exact numbers have moved as the feature shifted between subscription plans, so treat any specific cap as approximate.
There's also a NotebookLM Enterprise edition sold through Google Cloud for organizations that need their data handled under enterprise terms, priced per user or by usage rather than as a flat consumer fee.
Getting Started
It takes about a minute to get going.
- Go to notebook.google and sign in with a Google account, or install the app from Google Play or the App Store.
- Create a notebook and add sources: upload PDFs and Word files, paste raw text, drop in a website URL or YouTube link, or pull a Doc or Slides file from Google Drive.
- Ask questions in the chat panel. Every answer includes numbered citations; click one to jump to the exact passage it came from.
- Open the Studio panel to generate an Audio Overview, mind map, study guide, briefing, or quiz from the same sources.
- To shape an Audio Overview, pick a format (deep dive, brief, critique, or debate), set the length, and tell the hosts what to focus on before generating. Once it's playing, tap Join to ask them a question directly.
Category: Research / Productivity
Platform: Web, iOS 17+, Android 10+
Price: Free; NotebookLM Plus included with Google AI Plus at $4.99/month in the US and €4.99 in EU
Frequently Asked Questions
Yes. The core product is free with any Google account, and the free tier is fairly generous: up to 100 notebooks, 50 sources per notebook, around 50 chat questions a day, and a few Audio Overviews and reports daily. The paid tier, NotebookLM Plus, isn't sold separately to individuals. It's bundled into Google AI Plus at $4.99 a month in the US, and into the higher Google AI Pro and Ultra plans. Plus raises the limits and adds notebook sharing.
Mostly no. Uploading sources, chatting, and generating anything all run in the cloud and need a connection. The one real exception is the mobile apps, which let you download Audio Overviews and play them offline in the background, so you can listen on a flight or the subway.
On phones it's light: file and storage access so you can upload documents, an optional microphone permission if you want to talk to the Audio Overview hosts in interactive mode, and a share-sheet registration so other apps can send links and PDFs to it. On the web it can connect to Google Drive to import Docs and Slides. Google states that consumer content isn't used to train its models unless you actively send thumbs-up or thumbs-down feedback on a response; Workspace and Enterprise accounts are covered by stricter data terms.