OpenUI

OpenUI

Thesys
+
+

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About

A2UI is a declarative UI protocol designed to enable AI agents to generate rich, interactive user interfaces that render natively across web, mobile, and desktop environments without executing arbitrary code. Instead of relying on text-only interactions or unsafe approaches like sending HTML or JavaScript, A2UI allows agents to communicate UI intent through structured JSON messages that describe components, layouts, and data bindings, which client applications then render using their own trusted, pre-approved components. This approach separates UI generation from UI execution, ensuring that interfaces are secure, consistent with the host application’s design system, and adaptable across platforms. It is designed to be LLM-friendly, using a flat, streaming JSON structure that allows agents to incrementally build and update interfaces in real time, enabling progressive rendering and responsive user experiences.

About

OpenUI is an open-source (MIT) generative UI framework for AI agents. Instead of plain text, your agent writes OpenUI Lang, a compact, streaming-first language, and OpenUI renders it progressively as real UI: charts, tables, forms, cards and layouts. Rendering is safe by default: the model can only use components you register and no generated code is executed, so your design system stays in control. A framework-agnostic core powers first-party runtimes for React, Vue, Svelte and Angular, with ready-made chat interfaces and integrations for LangChain/LangGraph, the Vercel AI SDK, Mastra, Google ADK, assistant-ui, CopilotKit, AG-UI and A2UI. In its published benchmark, OpenUI Lang uses about half the tokens of equivalent JSON UI formats, so interfaces stream faster and cost less.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Supported
iPhone Supported
iPad Supported
Android Supported
Chromebook Supported

Audience

AI developers and product teams who want to build agent-driven applications where models generate secure, dynamic user interfaces instead of just text responses

Audience

Developers building AI agents, copilots and chat apps who want agents to answer with interactive UI instead of text

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

Free
Free Version Supported
Free Trial Not Supported

Pricing

Free
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

A2UI
United States
a2ui.org

Company Information

Thesys
Founded: 2024
United States
www.openui.com

Alternatives

Alternatives

QML

QML

Qt
LangGraph

LangGraph

LangChain
Flint AI

Flint AI

SandboxAQ

Categories

Agentic AI Supported

Categories

Integrations

A2UI Not Supported
AG-UI Not Supported
Agent Development Kit (ADK) Not Supported
CopilotKit Not Supported
HTML Supported
JSON Supported
JavaScript Supported
LangChain Not Supported
LangGraph Not Supported
Mastra AI Not Supported
OpenUI Supported
Vercel AI SDK Not Supported

Integrations

A2UI Supported
AG-UI Supported
Agent Development Kit (ADK) Supported
CopilotKit Supported
HTML Not Supported
JSON Not Supported
JavaScript Not Supported
LangChain Supported
LangGraph Supported
Mastra AI Supported
OpenUI Not Supported
Vercel AI SDK Supported
Claim A2UI and update features and information
Claim A2UI and update features and information
Claim OpenUI and update features and information
Claim OpenUI and update features and information