Side by side
Epic's Echo vs NotebookLM
The do-it-yourself answer: paste the transcript in and ask it questions. It is a good answer, and for some tables it is the right one. Here is where it stops.
What NotebookLM says, in its own words
“When you upload your sources, it instantly becomes an expert, grounding its responses in your material with citations and relevant quotes.”
Where the answers come from
“grounding its responses in your material with citations and relevant quotes”
What this one does
The same idea, one step further: a quote that can't be matched back to the recording is deleted before you ever see it, and you're told how many went.
Training on your game
“your personal data is never used to train NotebookLM”
What this one does
They print that promise. We don't, yet: no written contract with our model vendor covers it, and putting the line up before the contract exists would be exactly the kind of claim this site is built to avoid.
Where NotebookLM is ahead of us
NotebookLM grounds its answers in whatever sources you upload, with citations back to them. If a grounded chat over your own files is all you want, it is the better tool and we'd say so.
“When you upload your sources, it instantly becomes an expert, grounding its responses in your material with citations and relevant quotes.”
blog.google·checked 2026-08-16
Quotes are copied word for word on the date shown, and other people ship changes too. If something here has gone out of date, tell us: the page gets corrected or it comes down.
30 days, and the clock starts at your first upload — not at signup.