Side-by-side comparison of free tiers, features, privacy, and company background. Updated for 2026.
AI research — 100 notebooks, audio overviews
Upload PDFs, websites, or YouTube videos and NotebookLM creates an AI expert grounded solely in your sources. The Audio Overview feature generates a realistic podcast-style discussion about your content. Best for students and researchers who want to deeply understand uploaded material.
Visit notebooklm.google → Create a notebook and upload your sources (PDFs, URLs, text) → Ask questions or generate an Audio Overview podcast
AI workspace with databases and wikis
Combines a powerful workspace (docs, databases, wikis, calendars) with AI that understands your entire workspace context. The AI can summarize pages, generate content, and answer questions about your data. Best for teams who want an all-in-one workspace with AI built in.
Sign up at notion.so → Create a workspace and add pages or databases → Use the AI assistant (press Space) to write, summarize, or brainstorm