NotebookLM is Google's research assistant, which Google has renamed Gemini Notebook, though many people still know it by the old name. The idea is simple: you upload your own sources, such as PDFs, Google Docs files, website links, YouTube videos or audio files, and NotebookLM answers only from those sources, placing a citation to the original text beside each sentence. Its main difference from general chatbots is that it stays within your sources, which reduces hallucination, plus outputs such as podcasts, summary videos and flashcards.
What is NotebookLM good for?#
- Studying: a student uploads the notes and slides of a course and gets summaries, flashcards and practice quizzes.
- Podcasts from sources: it turns a long report into a two-voice audio conversation you can listen to on your commute.
- Thesis research: you put dozens of papers side by side and ask which ones reached opposing results on a particular method.
- A team knowledge base: you collect product documentation or support guidelines in one notebook so colleagues can ask it questions.
- Video summaries: you give it the links to several YouTube tutorials and get tidy text with references to the time of each section.
Strengths and weaknesses#
Strengths:
- Answers only from your sources, with clickable citations to the original text
- Podcasts and summary videos
- A very useful free tier
- Many source types: PDFs, web pages, YouTube, audio and Google files
Weaknesses:
- Not built for general knowledge or open web search
- Generated podcasts in some languages can have wrong pronunciation, a translated tone or factual slips
- Poor-quality scanned PDFs are not read well
- The rename and merge into the Gemini app may change how you access it in the future
Free tier and pricing#
NotebookLM is freemium. The free tier with a Google account gives a reasonable number of notebooks and sources and a few audio and visual outputs per day. Paid Google plans multiply the limits and get new features, such as code execution for data analysis, sooner. An enterprise version is also available inside Google Workspace. Check the official site for current pricing.
Language support#
NotebookLM handles many languages well: it understands sources in them, answers fluently and, when you set the output language, generates podcasts and video summaries in that language too. Audio quality in less common languages is acceptable but not flawless. Google's AI services are not available in every country, so check availability where you live.
Getting started in three steps#
- Sign in with a Google account and create a new notebook.
- Add the sources related to one topic rather than putting everything in one notebook.
- Ask a specific question and click the citations to check the answer against the original text.
NotebookLM alternatives#
- ChatPDF: simpler and quicker for chatting with one or more PDFs.
- Perplexity: if you want cited web search instead of your own sources.
- SciSpace: made for scientific papers, with search across research databases.
- Gemini: Google's general assistant, which can now reach NotebookLM notebooks too.
To use it better, read working with long documents using AI: summarizing, asking and comparing. The mechanism NotebookLM relies on is explained in what RAG is: when AI answers from your own data, and tokens, context windows and hallucination: three concepts to know before working with AI shows why you should still check the citations.
