Mem0
Gives an agent continuity across sessions — the missing piece once users expect it to remember them.
An agent that forgets everything between sessions feels broken to anyone who uses it more than once. Mem0 provides the persistence layer: it extracts candidate facts from conversations, resolves conflicts with existing memories, and retrieves relevant ones at the start of the next turn. The design question you inherit is what to store and for how long — memory that is wrong is worse than no memory, and memory containing personal data inherits every obligation your privacy policy already has. Start with a narrow, explicitly user-visible memory scope.
Best for: Assistants and agents where cross-session continuity is a product requirement