Google's NotebookLM is great. But handing your research notes, PDFs, and meeting transcripts to Google's cloud is a hard sell for a lot of people — especially when those documents contain client data, unpublished research, or internal strategy.

So I spent a weekend testing five open-source alternatives. Three things mattered: can I docker compose up in under 10 minutes, does the podcast feature actually work offline, and what breaks first?

Here's what I found.

The Contenders

Project