Letta

Stateful agents with long-term memory

What is Letta?

Letta (formerly MemGPT) is a framework and server for building stateful agents with long-term memory that persists across sessions, with a visual agent editor.

Why people choose Letta

• Persistent long-term agent memory
• Server with REST API and visual editor
• Model-agnostic and self-hostable

Letta at a glance

Open-source alternatives to Letta

Other open-source ai agent framework tools worth comparing:

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Letta head-to-head

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