assistant-ui

Open-source TypeScript/React library for AI chat interfaces, providing production-ready components and state management for building ChatGPT-style UIs, copilots, and agents.

About assistant-ui

assistant-ui helps frontend developers add AI chat to their apps. Our product is used by several dozen companies, like LangChain, Stack AI, Browser Use, and Athena Intelligence. We're building an open source Typescript/React library and a backend as a service, with first class integrations into popular agent frameworks like LangGraph and Vercel AI SDK.

Products

  • assistant-ui

    Developer Tools & PlatformsFree plan

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    Open-source React components and runtimes for building AI chat — ChatGPT-style UIs, copilots, and agents in TypeScript with streaming, tools, and persistence.

  • assistant-cloud

    Developer Tools & PlatformsFrom $50/month

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    Fully managed backend for AI chat applications with chat history, thread management, and data replication.

Security and compliance

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