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@letta-ai

Letta

The platform for stateful AI agents
README.md

Hello World 👾

Letta Logo

Letta adds state to your LLMs to give them advanced reasoning capabilities and transparent long-term memory. You can use Letta to create powerful LLM agents that can reason about their past interactions, learn from them, and improve their behavior over time.

  • Download the Letta open source framework on GitHub
  • Try the Agent Development Environment (ADE) to build stateful agents in a no-code UI
  • Read the Letta docs to learn about the ADE, Python and TypeScript/Node.js SDKs, Vercel AI SDK integrations and more
  • Join our team and other Letta users and developers on our Discord server

Letta is made with ❤️ by our team in San Francisco (join us!) and over 100 individual contributors from around the world.

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  1. letta letta Public

    Letta is the platform for building stateful agents: open AI with advanced memory that can learn and self-improve over time.

    Python 19.4k 2k

  2. agent-file agent-file Public

    Agent File (.af): An open file format for serializing stateful AI agents with persistent memory and behavior. Share, checkpoint, and version control agents across compatible frameworks.

    Python 965 86

  3. letta-chatbot-example letta-chatbot-example Public

    An example chatbot application built on the Letta API, which makes each chatbot a stateful agent (agent with memory) under the hood.

    TypeScript 89 37

  4. letta-discord-bot-example letta-discord-bot-example Public

    An example Discord chatbot built on the Letta API, which uses a stateful agent (agent with memory) under the hood.

    TypeScript 30 13

  5. letta-node letta-node Public

    A TypeScript SDK for accessing the Letta API

    TypeScript 36 7

  6. letta-python letta-python Public

    A Python SDK for accessing the Letta API

    Python 46 9

Repositories

Showing 10 of 34 repositories
  • letta-code Public

    A self-improving, stateful coding agent that can learn from experience and improve with use.

    letta-ai/letta-code’s past year of commit activity
    TypeScript 119 Apache-2.0 18 6 9 Updated Dec 4, 2025
  • learning-sdk Public

    Drop-in SDK for adding continual learning and long-term memory to any LLM agent.

    letta-ai/learning-sdk’s past year of commit activity
    Python 11 Apache-2.0 0 0 1 Updated Dec 4, 2025
  • letta-discord-bot-example Public

    An example Discord chatbot built on the Letta API, which uses a stateful agent (agent with memory) under the hood.

    letta-ai/letta-discord-bot-example’s past year of commit activity
    TypeScript 30 MIT 13 4 0 Updated Dec 4, 2025
  • letta-python Public

    A Python SDK for accessing the Letta API

    letta-ai/letta-python’s past year of commit activity
    Python 46 Apache-2.0 9 3 2 Updated Dec 2, 2025
  • skills Public

    A shared repository for skills.

    letta-ai/skills’s past year of commit activity
    Python 8 0 0 2 Updated Dec 2, 2025
  • letta-node Public

    A TypeScript SDK for accessing the Letta API

    letta-ai/letta-node’s past year of commit activity
    TypeScript 36 Apache-2.0 7 0 3 Updated Dec 2, 2025
  • letta-telegram Public

    A Modal application for serving a Letta agent on Telegram.

    letta-ai/letta-telegram’s past year of commit activity
    Python 14 4 0 0 Updated Dec 1, 2025
  • letta-evals Public

    Evaluation kit for testing Letta AI agents

    letta-ai/letta-evals’s past year of commit activity
    Python 20 Apache-2.0 0 1 2 Updated Dec 1, 2025
  • letta Public

    Letta is the platform for building stateful agents: open AI with advanced memory that can learn and self-improve over time.

    letta-ai/letta’s past year of commit activity
    Python 19,383 Apache-2.0 2,037 19 48 Updated Nov 29, 2025
  • agent-file Public

    Agent File (.af): An open file format for serializing stateful AI agents with persistent memory and behavior. Share, checkpoint, and version control agents across compatible frameworks.

    letta-ai/agent-file’s past year of commit activity
    Python 965 Apache-2.0 86 6 3 Updated Nov 22, 2025
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