NotebookLM
Your AI research tool and thinking partner
Founded
2023
Starting Price
$0
Category
AI & Machine Learning
Last updated April 27, 2026
About NotebookLM
NotebookLM is a source-grounded AI research assistant built by Google, powered by Gemini, that analyzes your uploaded documents and turns complexity into clarity. Upload PDFs, Google Docs, websites, and YouTube videos to create a private knowledge base you can chat with, generate podcast-style audio overviews from, and transform into study guides and mind maps.
Pros & Cons
Pros
- Source-grounded accuracy with inline citations for every response, reducing hallucinations
- Outstanding Audio Overviews generate realistic podcast-style discussions of your content
- Generous free tier with 100 notebooks and 50 sources per notebook
- High-quality synthesis across multiple documents into well-structured briefings
- Versatile source support handling PDFs, Docs, websites, and YouTube videos
Key Features
Source-Grounded AI Chat
Ask questions about uploaded documents and get answers with inline citations pointing back to exact source material
Audio Overviews
Transform documents into realistic podcast-style conversations with two AI hosts who summarize and discuss your content
Interactive Audio Mode
Raise your hand during Audio Overviews to ask questions — AI hosts pause, answer, then resume
Multi-Source Notebooks
Upload up to 50 sources per notebook including PDFs, Google Docs, Slides, websites, and YouTube videos
Study Aids Generation
One-click creation of flashcards, quizzes, study guides, and learning guides from materials
Studio Panel
Generate mind maps, slide decks, infographics, data tables, and video overviews from sources
Note-Taking & Synthesis
Save AI responses as notes, pin key insights, and build structured knowledge across documents
Pricing
Free
$0
- 100 notebooks
- 50 sources per notebook
- 50 daily chat queries
- 3 audio overviews/day
Google One AI Premium
$19.99/month
Best For
Academic Research & Study
Upload lecture notes and papers to generate study guides, flashcards, and audio summaries for exam preparation
Business Intelligence
Upload financial reports and strategy documents to extract executive summaries and strategic insights
Content Repurposing
Transform blog posts and whitepapers into podcast-style audio overviews and slide decks
Meeting Preparation
Upload product specs and competitive analysis for instant briefings before client calls
Similar Tools
Featured In
#6
6 Best AI-First Productivity & Workspace Tools (2026)
Best free AI tool for document synthesis and research — the most trustworthy AI for accuracy-critical work with source-grounded, citable responses
#5
7 Best AI Tools for Academic Research & Literature Review (2026)
Best free tool for deeply analyzing a collected set of research papers with zero hallucination risk — ideal as a comprehension companion alongside discovery tools.
