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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 19.2k 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 952 85

  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 87 36

  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.

    JavaScript 27 13

  5. letta-node letta-node Public

    A TypeScript SDK for accessing the Letta API

    TypeScript 35 7

  6. letta-python letta-python Public

    A Python SDK for accessing the Letta API

    Python 44 8

Repositories

Showing 10 of 34 repositories
  • letta-node Public

    A TypeScript SDK for accessing the Letta API

    letta-ai/letta-node’s past year of commit activity
    TypeScript 35 7 1 3 Updated Nov 15, 2025
  • letta-python Public

    A Python SDK for accessing the Letta API

    letta-ai/letta-python’s past year of commit activity
    Python 44 8 3 2 Updated Nov 15, 2025
  • 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 88 Apache-2.0 12 4 7 Updated Nov 14, 2025
  • agentic-learning-sdk Public

    Drop-in SDK for adding persistent memory and learning to any agent.

    letta-ai/agentic-learning-sdk’s past year of commit activity
    Python 2 Apache-2.0 0 0 0 Updated Nov 14, 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 19,162 Apache-2.0 1,998 22 49 Updated Nov 14, 2025
  • skills Public

    A shared repository for skills.

    letta-ai/skills’s past year of commit activity
    Python 5 0 0 0 Updated Nov 13, 2025
  • letta-evals Public

    Evaluation kit for testing Letta AI agents

    letta-ai/letta-evals’s past year of commit activity
    Python 16 Apache-2.0 0 0 2 Updated Nov 12, 2025
  • co Public

    Your thinking partner.

    letta-ai/co’s past year of commit activity
    TypeScript 6 2 0 0 Updated Nov 11, 2025
  • vercel-ai-sdk-provider Public

    The official Vercel AI SDK provider for Letta - the platform for building stateful AI agents with long-term memory. This provider enables you to use Letta agents seamlessly with the Vercel AI SDK ecosystem.

    letta-ai/vercel-ai-sdk-provider’s past year of commit activity
    TypeScript 14 MIT 7 0 0 Updated Nov 10, 2025
  • ai-memory-sdk Public

    An experimental SDK for adding agentic memory and learning in a pluggable way

    letta-ai/ai-memory-sdk’s past year of commit activity
    Python 31 Apache-2.0 3 1 0 Updated Nov 5, 2025
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