🧠 Zep

Zep is a purpose-built long-term memory service for AI agents and chatbots. It persists conversation history as Users and Sessions, extracts facts and summaries automatically, and provides semantic search over stored memories — enabling agents to recall context across many sessions without growing the context window.

• Users and Sessions model for multi-tenant memory management
• Automatic fact extraction and conversation summarisation
• Semantic search over stored memories at query time
• ZepCloudChatMessageHistory for LangChain integration
• Zep Cloud (managed) or self-hosted open-source options