Mem

Mem uses AI to automatically surface related notes, find connections across your knowledge base and answer questions about what you've written. No folders required — you just write and the AI organises. Mem X (the AI layer) has been improving rapidly since 2024.

The closest thing to a self-organising second brain. If you hate filing things and want an AI to handle the organisation for you, Mem is the most mature implementation of that vision.

Every place Mem shows up across Choose My Stack — the research it’s part of and the articles that cover it.

The honest list