A mind map made by Notebooklm .. and A Presentation with chalkie ai .. and A pdf made with Teachy ai .
My experience is : What I noticed is that what distinguishes NotebookLM is that it can extract information for you from multiple sources, unlike Chalkie and Teachy. However, Chalkie is also distinguished by providing follow-up questions to reinforce understanding of the lesson, while Teachy stands out for its ease of use — it does not require many commands — but at the same time it has limited options.