NotebookLM

NotebookLM is Google's source-grounded AI research and note-taking assistant: you upload documents — PDFs, Google Docs, web pages, YouTube videos, audio — and it answers questions using only those sources, citing the exact passage behind every answer. If the answer is not in your sources, it says so. Google renamed it Gemini Notebook on July 16, 2026, and reports more than 30 million users and 600,000 organizations.

Key facts: it runs on Gemini 3 and turns a notebook into podcast-style Audio Overviews, Video Overviews, mind maps, flashcards, quizzes, timelines and reports, plus a Deep Research mode that scans trusted web sources into a structured report. Sources can hold up to 500,000 words each, and notebooks sync with the Gemini app.

Plans: free with a Google account — 100 notebooks, 50 sources per notebook, and a usage budget that refreshes every 5 hours. Higher limits come bundled into Google AI plans: Plus at $4.99/month, Pro at $19.99/month (about 5x limits) and Ultra at $99.99/month. There is no standalone NotebookLM subscription.

Best for: students, researchers, writers and teams working through long documents they need to trust. Watch out: files are processed on Google's servers, so it is not the right home for confidential material, and the fully animated Cinematic Video Overview is a paid-only feature.

Pros

• Answers only from your uploaded sources, with citations to the exact passage.
• Says so when the answer is not in your sources, instead of guessing.
• Accepts PDFs, Google Docs, web pages, YouTube videos and audio.
• Extras include podcast-style overviews, study guides and mind maps.

Watch out for

• It is only as good as the sources you upload; weak sources mean weak answers.
• It is a research assistant, not a general chatbot for open-ended questions.
• Large source collections still need curation to stay useful.

Best for

Students, researchers and professionals working through a defined set of documents. Who should skip it: anyone wanting open-ended chat or creative writing should use a general chatbot instead.

Pricing

NotebookLM is free to use; check the official pricing page for current plans and limits.

FAQs

How is NotebookLM different from a chatbot? It answers only from your documents and cites the exact passage behind every answer.

What can I upload? PDFs, Google Docs, web pages, YouTube videos and audio.

What if the answer is not in my sources? It says so rather than inventing an answer.