Keywords AI
Letta vs Zep
Compare Letta and Zep side by side. Both are tools in the Memory Layer category.
Quick Comparison
| Category | Memory Layer | Memory Layer |
| Pricing | — | Open Source |
| Best For | — | Developers building conversational AI that needs structured memory and dialog management |
| Website | letta.com | getzep.com |
| Key Features | — |
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| Use Cases | — |
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When to Choose Letta vs Zep
- Enterprise AI assistants with memory
- Customer service bots that remember past issues
- Personalized recommendation agents
About Letta
Letta (formerly MemGPT) is an open-source framework for building AI agents with long-term memory and self-editing capabilities. It implements a virtual context management system that allows LLMs to manage their own memory hierarchy, enabling persistent state, unbounded context, and adaptive memory across conversations.
About Zep
Zep is a long-term memory service for AI assistants and agents. It stores conversation history, extracts facts and entities, builds temporal knowledge graphs, and enables semantic search across past interactions. Zep helps AI applications recall relevant context from previous conversations, making chatbots and agents feel more natural and personalized. Available as open-source and cloud-hosted.
What is Memory Layer?
Tools and frameworks for adding persistent, long-term memory to AI agents and LLM applications. These systems manage conversation history, user preferences, and learned context across sessions, enabling more personalized and context-aware AI interactions.
Browse all Memory Layer tools →