How this compares, including where it loses.
Every page below names the cases where the other product is the better choice, because a comparison that does not is not a comparison. NotebookLM's free tier is more generous than this product's; focused Q&A tools are cheaper and simpler. Those are said on the pages rather than left out of them.
ChatPDF alternative
A ChatPDF alternative for people who also need to annotate, draw and plan around the document. Compared honestly, including where ChatPDF wins.
NotebookLM alternative
An honest NotebookLM alternative. NotebookLM's free tier is excellent; this is for when you need to annotate, draw and plan around your sources.
Humata alternative
A Humata alternative for research reading: grounded answers with linked citations on Pro, plus annotations, a canvas and a planner around the paper.