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Letta icon

Letta

Platform for building stateful AI agents with long-term memory that learn and self-improve over time, from the creators of MemGPT.

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  • Online
  • Linux
  • Mac
  • Windows
  • Self-Hosted
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Letta information

  • Developed by

    Letta

  • Licensing

    Open Source (Apache-2.0) and Freemium product.

  • Pricing

    Subscription that costs $20 per month + free version with limited functionality.

  • Alternatives

    4 alternatives listed

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  • Supported Languages

    • English

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AI Tools & Services

GitHub repository

  •  24,452 Stars
  •  2,597 Forks
  •  39 Open Issues
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Letta was added to AlternativeTo by Filippo-Pilotta on and this page was last updated .

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What is Letta?

Letta, formerly known as MemGPT, is a platform for building stateful AI agents with advanced, self-editing memory. Born from the MemGPT research project at UC Berkeley, it gives agents a virtual context that persists beyond a single conversation: agents decide what to store, rewrite their own memory blocks and keep learning across sessions. It is model-agnostic, works with OpenAI, Anthropic and local models, exposes agents through REST APIs and SDKs in Python and TypeScript, and ships a visual Agent Development Environment for inspecting exactly what an agent remembers. The core server is open source and can be self-hosted with Docker, while Letta Cloud offers a managed deployment.