NotebookLM

Provider: Google

NotebookLM is an AI-powered tool by Google Labs that helps users upload and interact with documents (e.g., PDFs, Google Docs/Slides, web content, transcripts), offering summaries, explanations, chat interface, audio overviews, mind maps, and guided research. It grounds responses in user-provided sources and integrates with Google Workspace apps. Theres also an enterprise-grade version with enhanced limits and compliance features.

Free then $19.99/month