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NotebookLM

Free tier

Your AI-powered research and note-taking assistant, grounded in your sources

Free tier available·All audiences·Powered by Google
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Key strengths

Grounds all AI responses strictly in user-uploaded sourcesGenerates AI-powered audio overviews (podcast-style summaries)Supports multiple source types: PDFs, Google Docs, URLs, YouTube videosInstant Q&A and document summarization with inline citationsDeep integration with Google Workspace ecosystem
Free tier + paid plans
Mountain View, United States
Founded 2023
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Technical Setup & Integration Notes

Authentication: NotebookLM requires a Google Account (personal or Workspace). There is no public REST API as of mid-2025; access is exclusively through the web UI at notebooklm.google.com.

Source Ingestion:

  • Supported types: Google Docs, Google Slides, PDFs, web URLs, YouTube video URLs, and plain text pastes.
  • Limits (free tier): Up to 50 sources per notebook; up to 500,000 words per source.
  • Google Drive sources are referenced live; external PDFs and text are copied at upload time.

Model Backend: Powered by Gemini (Google DeepMind). All queries use retrieval-augmented generation (RAG) — the model's responses are conditioned on the uploaded source context, reducing hallucination.

NotebookLM Plus (paid/enterprise):

  • Available via Google One AI Premium or Google Workspace add-on.
  • Higher limits: up to 5× more notebooks, queries, and audio overviews.
  • Customizable Audio Overview style and length.
  • Enterprise data governance controls for Workspace deployments.

No API / Embedding: As of now, NotebookLM does not expose a public API for programmatic source ingestion or querying. Developers seeking similar functionality programmatically should look at the Gemini API with RAG capabilities via Google AI Studio or Vertex AI.