CopilotKit records 403,148 monthly visits with +199.4% month-over-month growth and Freemium pricing. LangUI records 1,872 monthly visits with -18% growth and Free pricing.
Open-source frontend stack for building AI agents and copilots inside your own product
Open source Tailwind CSS components for AI and GPT interfaces
| Dimension / Metric | | |
|---|---|---|
| Official Domain | copilotkit.ai | langui.dev |
| Pricing Model | Freemium | Free |
| Monthly Visits | 403.15K (403,148) | 1.87K (1,872) |
| MoM Traffic Delta | +268.49K (+199.4%) | -412 (-18%) |
| Primary Market & Share | 🇺🇸 United States (18.9%) | 🇮🇳 India (100%) |
| Direct Visits / mo | 179.26K | 577 |
| User Rating | 4.6 | 4.5 |
| Supported Platforms | Website | Website |
Open-source frontend stack for building AI agents and copilots inside your own product
Ship a working copilot UI in minutes with drop-in components for React, Angular, Vue, iOS, and Android, or go fully headless for total control over rendering.
A general-purpose bi-directional link between your app and any agent backend, with integrations for the OpenAI Agents SDK, Claude Agent SDK, LangChain, Google ADK, AWS Strands, Mastra, and many more.
Agents return real UI — charts, forms, tables, and approval prompts rendered with your own design system on the same screen the user is already working in.
Let agents read and write application state, call your frontend functions, and pause for human approval before sensitive actions are executed.
Open source Tailwind CSS components for AI and GPT interfaces
Grab the markup for any component and drop it into your project, with zero dependencies and nothing to install.
Components cover the patterns common to GPT and chatbot products, such as prompt inputs, chat layouts and response areas.
Every component is designed to look good in both colour schemes out of the box.
Layouts adapt to different screen sizes so the same component works on mobile and desktop.
SpecialistCombines conversational workflow drafting with visual flow builders, focusing on workflow automation rather than frontend copilot embedding.
SpecialistCombines conversational workflow drafting with visual flow builders, focusing on workflow automation rather than frontend copilot embedding.
SpecialistIDE extension providing model-agnostic AI coding assistance rather than a frontend UI component library for web applications.
SpecialistFocuses on Python-based agent building and deployment rather than frontend React component integration for web applications.
Delivers a managed platform for building and deploying conversational agents, though less focused on open-source frontend React UI kits.
Delivers a managed platform for building and deploying conversational agents, though less focused on open-source frontend React UI kits.
AI design engineer that ships production-ready frontend
AI design engineer that ships production-ready frontend
Free / Open-sourceProvides an open-source TypeScript framework where agents and user interfaces share capabilities, aligning with CopilotKit's architecture.
Free / Open-sourceProvides an open-source TypeScript framework where agents and user interfaces share capabilities, aligning with CopilotKit's architecture.
Free / Open-sourceCopy-owned React components and blocks that run AI models on-device, with no server and no API key.
Free / Open-sourceCopy-owned React components and blocks that run AI models on-device, with no server and no API key.
Designer-grade UI components and full apps, shipped straight into your stack
Designer-grade UI components and full apps, shipped straight into your stack
Design visually in Tailwind CSS and export production-ready code for any framework
Design visually in Tailwind CSS and export production-ready code for any framework
SpecialistCustom AI chatbot and support agent builder designed for omnichannel embedding rather than developer framework integration.
SpecialistCustom AI chatbot and support agent builder designed for omnichannel embedding rather than developer framework integration.
Free / Open-sourceAn open-source, code-free studio for building parametric and generative design systems
Free / Open-sourceAn open-source, code-free studio for building parametric and generative design systems
Free / Open-sourceAn open-source toolkit for adding AI agents to your React app
Free / Open-sourceAn open-source toolkit for adding AI agents to your React app
