NotebookLM is listed under Deep Research & Documents, in the Research & Learning category on Flocci AI Tools. Grounded answers from your own sources. It is freemium — a usable free tier with paid plans above it, and it lives at notebooklm.google.
NotebookLM is freemium: there is a free tier you can work in and paid plans above it. It is one of 391 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.
NotebookLM does 4 things the catalog singles out: Grounded answers from your own sources; audio overviews (podcast-style); mind maps and study guides; free tier available.
STORM (Stanford) is the closest free alternative: it sits in the same Deep Research & Documents sub-category and is free. ChatGPT Deep Research, ChatPDF and Gemini Deep Research also start free. The full list is on the alternatives page.
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