Zep is a context engineering and long-term memory platform that lets AI assistants persist, recall, and reason over past conversations and business data. It automatically generates summaries and artifacts from chat history, embeds messages and summaries for vector search, and constructs a temporal knowledge graph (Graphiti) to track state changes over time. Zep processes memory operations asynchronously to avoid impacting chat latency, offers SDKs for multiple languages, and is available as an open-source community edition plus a managed Zep Cloud service with additional features like dialog classification and structured data extraction. The platform is designed to reduce hallucinations, lower retrieval latency and cost, and enable more intentional prompt construction and personalized agent behavior.