Honcho

Where it runs

• API
• CLI

Tags

• #memory
• #agents
• #personalization
• #self-hosted

• View Cognee details

  MemoryFREEMIUMOpen core

  CO

  Cognee

  Cognee

  Open-source memory for AI agents.

  An open-source semantic memory layer for AI agents. Cognee ingests documents, relational data, and system context, then runs an Extract-Cognify-Load pipeline that uses an LLM to build a knowledge graph with embeddings and relationships. Agents query it for durable, cross-session context that captures how concepts connect. Self-host the Python SDK for free, or use the managed cloud tiers.

  AI insight: Pairs vector search with an LLM-built knowledge graph so recall can follow relationships, not just nearest-neighbor similarity.

  • agent-memory
  • knowledge-graph
  • rag
  • open-source

  Open
• View Supermemory details

  MemoryFREEMIUMOpen core

  SU

  Supermemory

  Supermemory

  Memory API that gives any AI agent long-term recall.

  Supermemory is a memory and context engine for AI apps. It ingests documents, chat histories, and connector data (Drive, Gmail, Notion), turns them into a searchable store, and serves relevant context back to agents over a single API. It works with any model and ships an MCP server alongside official SDKs.

  AI insight: MIT-licensed memory engine you can self-host or call as a managed API — one recall endpoint that works across any model.

  • agent-memory
  • rag
  • long-term-memory

  Open
• View Zep details

  MemoryFREEMIUM

  ZE

  Zep

  Zep

  Temporal knowledge-graph memory for AI agents.

  Memory layer that gives agents long-term context by building a temporal knowledge graph from chat history and business data, tracking how facts evolve over time. It's powered by Graphiti, Zep's Apache-2.0 open-source temporal graph engine, with Zep Cloud offering a managed, credit-based service on top. Used to keep agent context relevant as conversations and data grow.

  AI insight: Built on its open-source Graphiti engine, it stores a temporal knowledge graph that versions how facts change over time, not flat snapshots.

  • memory
  • agents
  • knowledge-graph
  • temporal
  • +1

  Open
• View Letta details

  MemoryFREEMIUMOpen core

  LE

  Letta

  Letta

  Stateful agents with structured memory. Successor to MemGPT.

  Open-source framework for building stateful agents — memory blocks, context-window management, tool-use primitives baked in. Useful as a reference architecture for long-running agents.

  AI insight: The productized successor to the MemGPT paper — agents edit their own memory blocks to manage a finite context window.

  • memory
  • stateful
  • agents
  • open-source

  Open
• View mem0 details

  MemoryFREEMIUMOpen core

  ME

  mem0

  Mem0

  Long-term memory layer for AI agents. Self-hostable.

  Persistent memory store + retrieval pipeline for agent applications. Handles per-user/per-session/per-agent scope cleanly; pairs with OpenAI, Anthropic, and local models.

  AI insight: Stores distilled facts rather than whole transcripts, so an agent's memory stays small and relevant as conversations grow.

  • memory
  • agents
  • rag
  • self-hosted

  Open