If you're not a fan of OpenAI: I work at RSpace (https://github.com/rspace-os/rspace-web) and we're an open-source research data management system. While we're not as modern as Obsidian or NotebookLM (yet - I'm spearheading efforts to change that :)) we have been deployed at universities and institutions for years now.

The solution is currently quite focused on life science needs but if you're curious, check us out!