The 10 Best AI Memory Layers for Agents in 2026

If you are building agents in 2026, you have already hit the wall. Bigger models do not fix forgetfulness. Context windows can grow forever, and the agent still cannot remember what a user told it last Tuesday, that the customer's address changed three months ago, or that a recommendation it made last year turned out to be wrong. This is why "agent memory" has become a category in its own right. Agent memory is distinct from RAG, from vector search, and from the model itself. Below are the ten p