NotebookLM

Function

Answers questions and generates summaries, audio overviews, and study aids from user-uploaded sources

Price

Free tier · paid from $7.99/mo

NotebookLM is Google’s source-grounded research tool: documents, links, and videos are uploaded into a notebook, and the AI answers questions using only those sources, with citations. It can also generate summaries, study guides, and podcast-style audio overviews from the uploaded material. A free tier covers core use; paid plans raise notebook, source, and daily-question limits.