assistant-ui
Open Source React.js Library for AI Chat
Simon Farshid · 1 founder
Profile coverage4 of 8 · missing Funding, Signals, Customers, Stack / tools · last run 8/10/2026
About
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.