YCW25· AI· Devtoolsassistant-ui
Open Source React.js Library for AI Chat
Founders
- Simon FarshidFounder/CEO
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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.
San Francisco, CA, USA
assistant-ui: questions
Which YC batch was assistant-ui in?
assistant-ui was in Y Combinator's Winter 2025 batch (W25).
Is assistant-ui still active?
Y Combinator lists assistant-ui as active.
Who founded assistant-ui?
assistant-ui's founders, as listed on its YC page: Simon Farshid (Founder/CEO).
Where is assistant-ui based?
assistant-ui lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.