User facts, task history, graph entities, and workflow state should be evaluated differently.
Open memory systems by recall model
Browse memory systems by what they store, how recall works, who controls the memory, and where the data can run.
Good memory retrieves the right context, explains why, and corrects stale information.
Memory needs scoping, deletion, export, and deployment choices because it stores sensitive context.
User and product memory
Memory layers for personalization, preferences, assistant continuity, and product-level recall.
Cognee
Open-source memory and data infrastructure for AI applications that need reliable context.
Graphiti
Temporal knowledge graph memory system for agents that need facts, entities, and time-aware context.
Letta
Platform for stateful agents with advanced memory, personalization, and learning over time.
Mem0
Open-source memory layer for AI agents and assistants that need personalized recall.
Memori
Open-source memory engine for LLM apps and agents that need persistent context injection.
Graph and knowledge memory
Systems that use graphs, RAG, retrieval, or knowledge structures to recall durable context.
Cognee
Open-source memory and data infrastructure for AI applications that need reliable context.
Graphiti
Temporal knowledge graph memory system for agents that need facts, entities, and time-aware context.
Mem0
Open-source memory layer for AI agents and assistants that need personalized recall.
Memori
Open-source memory engine for LLM apps and agents that need persistent context injection.
Agent state and workflow memory
Memory used to preserve agent state, decisions, tool history, and long-running workflow context.
Cognee
Open-source memory and data infrastructure for AI applications that need reliable context.
Graphiti
Temporal knowledge graph memory system for agents that need facts, entities, and time-aware context.
Letta
Platform for stateful agents with advanced memory, personalization, and learning over time.
Mem0
Open-source memory layer for AI agents and assistants that need personalized recall.
Memori
Open-source memory engine for LLM apps and agents that need persistent context injection.
Self-hosted memory infrastructure
Memory systems that can run closer to your data with APIs, local control, or self-hosted deployment.
Cognee
Open-source memory and data infrastructure for AI applications that need reliable context.
Graphiti
Temporal knowledge graph memory system for agents that need facts, entities, and time-aware context.
Letta
Platform for stateful agents with advanced memory, personalization, and learning over time.
Mem0
Open-source memory layer for AI agents and assistants that need personalized recall.
Memori
Open-source memory engine for LLM apps and agents that need persistent context injection.