memEx is a personal knowledge management tool designed to enable users to organize their notes effectively, drawing inspiration from methodologies like Zettelkasten and Org-mode. Key features under discussion include its scalability for handling large volumes of notes (e.g., 200,000), compatibility with various document formats (PDF, ePub, Evernote's ENEX), and the strength of its search functionalities compared to other tools like Evernote and Logseq. Users are particularly interested in how it stands against established alternatives in terms of efficiency and usability, notably in handling extensive note collections and diverse file types.