assistant-ui (YC Winter 2025)

TL;DR: assistant-ui is a Y Combinator Winter 2025 startup Open Source React.js Library for AI Chat, currently active with a team of 3.

Open Source React.js Library for AI Chat

YC ID
30355
YC Batch
Winter 2025
Status
Active
Team size
3
Industry
B2B, Infrastructure
Tags
Developer Tools, Generative AI, Chat
YC profile
https://www.ycombinator.com/companies/assistant-ui

Last verified:

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.

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Frequently asked questions

Is assistant-ui a YC (Y Combinator) company?

Yes. assistant-ui was funded by Y Combinator in the Winter 2025 batch. Open Source React.js Library for AI Chat

What does assistant-ui do?

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 framework…

What YC batch was assistant-ui in?

assistant-ui was part of Y Combinator's Winter 2025 batch.

How big is assistant-ui?

assistant-ui has a team of 3 people according to Y Combinator's directory.

Is assistant-ui still active?

assistant-ui is currently listed as Active with a team of 3 in Y Combinator's directory.

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