CopilotKit records 403,148 monthly visits with +199.4% month-over-month growth and Freemium pricing. Streamdown records 8,750 monthly visits with +193% growth and Free and open source pricing.
Open-source frontend stack for building AI agents and copilots inside your own product
A drop-in React Markdown renderer built for streaming AI output
| Dimension / Metric | | |
|---|---|---|
| Official Domain | copilotkit.ai | streamdown.ai |
| Pricing Model | Freemium | Free and open source |
| Monthly Visits | 403.15K (403,148) | 8.75K (8,750) |
| MoM Traffic Delta | +268.49K (+199.4%) | +5.76K (+193%) |
| Primary Market & Share | 🇺🇸 United States (18.9%) | 🇺🇸 United States (35.2%) |
| Direct Visits / mo | 179.26K | 3.39K |
| User Rating | 4.6 | 4.7 |
| 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.
A drop-in React Markdown renderer built for streaming AI output
Built-in Tailwind typography for headings, lists and code blocks, plus GitHub Flavored Markdown for tables, task lists, strikethrough and autolinks.
Caret indicators show that content is still generating, unterminated blocks are parsed rather than broken, and transitions are animated for smoother output.
Shiki-powered syntax highlighting with copy and download buttons, automatic language detection and optional line numbers.
LaTeX math through KaTeX, interactive Mermaid diagrams with fullscreen viewing, and CJK support so ideographic punctuation renders correctly.
Free / Open-sourceRun and build with open AI models locally or in the cloud
Free / Open-sourceRun and build with open AI models locally or in the cloud
Free / Open-sourceA minimal, extensible terminal coding agent you can reshape
Free / Open-sourceA minimal, extensible terminal coding agent you can reshape
Free / Open-sourceOpen-source control plane for orchestrating coding agents
Free / Open-sourceGive your coding agent real design judgment
Free / Open-sourceGive your coding agent real design judgment
One privacy-first AI client for GPT, Claude, Gemini and more
One privacy-first AI client for GPT, Claude, Gemini and more
Agentic coding with parallel AI agents that build and ship real products
Agentic coding with parallel AI agents that build and ship real products
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.
Free / Open-sourceAgent wiki and visual workspace for Claude Code and Codex
Free / Open-sourceAgent wiki and visual workspace for Claude Code and Codex
SpecialistIDE extension providing model-agnostic AI coding assistance rather than a frontend UI component library for web applications.
Free / Open-sourceHeadless rich text editor and document infrastructure for modern apps
Free / Open-sourceHeadless rich text editor and document infrastructure for modern apps
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.
