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@letta-ai

Letta

The platform for stateful AI agents
README.md

Hello World 👾

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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 18.6k 1.9k

  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 942 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 76 32

  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 24 10

  5. letta-node letta-node Public

    A TypeScript SDK for accessing the Letta API

    TypeScript 28 7

  6. letta-python letta-python Public

    A Python SDK for accessing the Letta API

    Python 41 7

Repositories

Showing 10 of 26 repositories
  • 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 18,644 Apache-2.0 1,933 33 42 Updated Oct 3, 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
    TypeScript 21 Apache-2.0 2 0 1 Updated Oct 2, 2025
  • letta-obsidian Public
    letta-ai/letta-obsidian’s past year of commit activity
    TypeScript 15 MIT 5 0 1 Updated Oct 2, 2025
  • letta-node Public

    A TypeScript SDK for accessing the Letta API

    letta-ai/letta-node’s past year of commit activity
    TypeScript 28 7 1 1 Updated Oct 1, 2025
  • letta-python Public

    A Python SDK for accessing the Letta API

    letta-ai/letta-python’s past year of commit activity
    Python 41 7 3 1 Updated Oct 1, 2025
  • thought-stream-website Public

    A viewer for a multi-agent chat room, powered by ATProto.

    letta-ai/thought-stream-website’s past year of commit activity
    JavaScript 1 0 0 0 Updated Sep 30, 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 9 MIT 4 0 0 Updated Sep 29, 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 6 3 0 0 Updated Sep 28, 2025
  • .github Public
    letta-ai/.github’s past year of commit activity
    1 1 0 0 Updated Sep 27, 2025
  • 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.

    letta-ai/letta-chatbot-example’s past year of commit activity
    TypeScript 76 MIT 31 0 1 Updated Sep 26, 2025
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