assistant-ui
Open Source React.js Library for AI Chat
assistant-ui is a business in b2b based in San Francisco, CA, USA.
Profile
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.
assistant-ui is positioned in b2b, a segment that rewards a clear, focused offering.
Its base of operations is San Francisco, CA, USA.
Directory data places it at the Winter 2025 stage.
Its team size is recorded as 3 employees.
Directory analysis
assistant-ui is an open‑source React.js library that enables frontend developers to embed AI chat functionality into their applications. The library is written in TypeScript and offers a backend‑as‑a‑service component, with seamless integrations into popular agent frameworks such as LangGraph and the Vercel AI SDK. It is currently used by a handful of companies, including LangChain, Stack AI, Browser Use, and Athena Intelligence.
Positioning: The company focuses on providing developer-friendly tooling for AI chat integration, positioning itself as a niche solution within the broader AI‑powered web development ecosystem. Its small team and open‑source model suggest a lean, community‑centric approach to product development.
Note: assistant‑ui offers a plug‑and‑play AI chat component for React applications.
Auto-generated directory analysis from public data · updated 9 Oct 2026. Informational only, not investment advice.
| Sector | B2B |
|---|---|
| Headquarters | San Francisco, CA, USA |
| Country | USA |
| Employees | 3 |
| Stage | Winter 2025 |
Website: assistant-ui.com
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