Memory & State
Mem0
Persistent memory layer for agents, copilots, and coding tools
Category
Memory & State
Memory and state systems that help agents retain, retrieve, reason over, and update context across sessions.
Editorial scope version 1.0 ยท effective 3 September 2026
Category listing
3 Memory & State Tools
Definition
What belongs in Memory & State?
This category covers durable memory or state layers built to support continuity in agent behavior, including conversation, entity, user, episodic, and workflow state.
Includes durable conversation, entity, user, episodic, and workflow memory that supports continuity across agent sessions, tasks, or workers.
Scope
Inclusion and exclusion criteria
Include when
- The system models memory or evolving state for agents rather than only storing documents.
- Retrieval, updates, or reasoning over past context is a documented core capability.
- The product addresses persistence across sessions, tasks, or agents.
Exclude when
- It is a generic database, cache, or vector store without an agent memory abstraction.
- It offers retrieval alone without maintaining meaningful agent state.
Selection guide
How to compare these tools
- What types of memory or state are represented?
- How are memories created, retrieved, corrected, and deleted?
- Can users inspect provenance and control retention?
Typical use cases
- Recall relevant context across agent sessions
- Maintain evolving user, entity, or workflow state
- Inspect, correct, retain, or delete agent memories
Category evidence
Sources for this category guidance
- LangChain memory overview
LangChain documents thread-scoped agent state for short-term memory and namespaced data shared across sessions for long-term memory.
accessed 2026-09-03
Comparable facts
Memory & State comparison
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| Tool | Classification | Pricing | Interfaces | Deployment | Verification |
|---|---|---|---|---|---|
| Mem0 | Agent-enabling | Freemium | REST API, Python SDK, JavaScript SDK, CLI | hosted, self-hosted, in-process library | documentation reviewed |
| Honcho | Agent-enabling | Freemium | REST API, Python SDK, TypeScript SDK, MCP integrations | hosted, self-hosted, Docker | documentation reviewed |
| Supermemory | Agent-enabling | Freemium | REST API, TypeScript SDK, Python SDK, MCP server, agent plugins, local command-line runtime | hosted, local, self-hosted, air-gapped enterprise | documentation reviewed |