Gistr is a tool I found by chance when I got curious about what type of NotebookLM alternatives are out there. I didn’t expect much because many AI study helpers tend to be one-note. But I almost instantly liked Gistr for how it combines document organization with note blocks and AI retrieval. Gistr’s most notable feature, however, is how it handles YouTube videos – I’d argue it does a better job than NotebookLM.