NotebookLM
A source-grounded AI research and learning assistant from Google.
What it does
Overview
Who it's for
Best suited for
- Research projects where source traceability matters.
- Course readings, policy documents, meeting packs, and training manuals.
- Students and educators who want summaries, study guides, and audio review from assigned materials.
- Teams that need a shared knowledge hub for complex documentation.
Key features
What you get
- Grounded chat over uploaded sources with citations for checking claims.
- Audio Overviews that turn source material into listenable AI-hosted summaries.
- Video Overviews, mind maps, notes, and other study artifacts for making dense material easier to review.
- Google Workspace integration for importing Docs and Slides and sharing notebooks with collaborators.
Pros & cons
The honest take
What works well
- Answers stay grounded in your uploaded sources — no hallucinated facts from the open web.
- Every claim is cited so you can click-verify it against the original document.
- Audio Overviews make dense material listenable during commutes or workouts.
- The free tier is genuinely useful with no hard paywall on core features.
- Accepts a wide range of inputs including PDFs, YouTube URLs, audio files, and Google Docs.
Worth knowing
- Cannot access the web or add information beyond what you've uploaded.
- Notebook size limits cap how much source material you can include at once.
- Audio Overview hosts can feel repetitive or overly casual for dense technical topics.
- No native mobile app — browser-based only on mobile devices.
Pricing
What it costs
Free for standard use. Higher limits and larger uploads are available through Google One AI Premium or qualifying Google Workspace plans.
Up to 50 notebooks, 200,000 words per notebook, audio overviews, and all core study tools.
Higher notebook limits, larger upload capacity, and priority processing via Google One AI Premium.
Best use cases
When to reach for it
Research synthesis
Upload a stack of academic papers and get a coherent summary that links every claim back to its source — no more hunting through PDFs.
Audio study sessions
Turn a dense textbook chapter or policy document into a podcast-style Audio Overview you can absorb on a commute or during a workout.
Classroom prep
Upload your curriculum docs and generate discussion questions, quiz prompts, study guides, and reading summaries in minutes.
Team knowledge hubs
Share a notebook loaded with company docs so the whole team can query the same trusted source and get consistent, cited answers.
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Official links