Zep
Memory and session management platform for AI assistants. Automatically extracts facts, preferences, and entities from conversations and surfaces them as structured memory. Supports temporal reasoning — knowing what was discussed last week versus now.
Mem0
Open-source persistent memory layer that gives AI agents the ability to remember users, preferences, and context across sessions. Supports vector, graph, and key-value storage backends. AWS partner for Strands Agents. YC W23, $24M raised, 30K+ GitHub stars.