CopilotKit vs Tambo
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A TypeScript toolkit for building chat and generative UI on top of AI agents in web, mobile, and chat apps.
Open source · MIT
React toolkit that lets AI agents render your own components as interactive UI.
The short answer
Choose CopilotKit if you need…
- Developers adding an AI assistant or agent interface to a React or Next.js app
- Teams who want one agent backend to serve a web app, a mobile app, and Slack or Teams
- Projects that need agents to ask users for confirmation or edits before continuing
- Developers building chat interfaces that render custom UI components from tool calls
Choose Tambo if you need…
- React developers who want an AI chat to show charts, forms, or boards instead of only text
- Teams willing to self-host the backend via Docker
- Developers integrating MCP servers into a React app
- Builders who want a starting template for an AI chat or analytics dashboard
Side-by-side
| CopilotKit | Tambo | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 38.5k | 11.2k |
| Setup difficulty | Intermediate | Intermediate |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | TypeScript | TypeScript |
| Last code update | 4 days ago | 5 days ago |
What each one is
CopilotKit
CopilotKit is an SDK for building applications where AI agents interact with users through a interface. It provides pieces such as a chat UI, shared state between agents and components, generative UI that agents can render at runtime, and human-in-the-loop prompts that pause an agent for user input. The README says the same agent can be served to React, Angular, Vue, React Native, and Slack or Microsoft Teams. The project is maintained by the company behind the AG-UI Protocol.
Tambo
Tambo is a React SDK for generative UI: you register your components with Zod schemas, and an AI agent picks the right one and streams its props so users can interact with it. It also includes a backend that manages conversation state and agent execution. The project's hosted Tambo Cloud is shutting down on October 31, 2026, so the README points to self-hosting for ongoing use.
Best for
CopilotKit
- Developers adding an AI assistant or agent interface to a React or Next.js app
- Teams who want one agent backend to serve a web app, a mobile app, and Slack or Teams
- Projects that need agents to ask users for confirmation or edits before continuing
- Developers building chat interfaces that render custom UI components from tool calls
Tambo
- React developers who want an AI chat to show charts, forms, or boards instead of only text
- Teams willing to self-host the backend via Docker
- Developers integrating MCP servers into a React app
- Builders who want a starting template for an AI chat or analytics dashboard
Strengths
CopilotKit
- Covers several frontends (React, Angular, Vue, React Native) and chat channels from one agent backend, per the README
- Built on the AG-UI Protocol, which the README says is adopted by several large framework vendors
- Permissive MIT license with an active repository and a large star count
Tambo
- Components are registered with Zod schemas, so the agent's output maps to typed props
- Handles streaming, cancellation, and reconnection according to the README
- Supports multiple LLM providers via your own API key, and works with frameworks like LangChain and Mastra
Not ideal for
CopilotKit
- Non-developers looking for a ready-made app; the README targets people writing code
- Projects that do not use JavaScript or TypeScript frontends, since the listed frameworks are JS-based
- Teams who want a fully self-contained product without integrating an agent framework of their own
Tambo
- People who need the hosted Tambo Cloud service, since it shuts down October 31, 2026 and new signups are closed
- Non-React projects, since the SDK is built for React
- Anyone wanting a no-code tool; this requires writing code and an LLM API key
Trade-offs
CopilotKit
- The README is partly a marketing overview; several features (Channels for Discord/WhatsApp, Vue quickstart) are listed as coming soon or only partly supported
- Some advanced features (rich threads, memories, analytics) belong to a separate hosted or self-hosted product called CopilotKit Intelligence, which may have its own plans
- Setup depends on your agent framework and frontend stack, so the learning curve is non-trivial
Tambo
- Tambo Cloud is shutting down, so you must self-host or migrate to keep the backend running
- Requires writing React code and configuring an LLM provider; not a turnkey end-user app
- Project is in active transition, so the README and roadmap may change
Getting started
CopilotKit
Set up with your coding agent (run from your project root)
npx --yes copilotkit@latest onboard startInstall agent skills for your coding agent
npx copilotkit@latest skills installTambo
Create a new Tambo app
npm create tambo-app my-tambo-appEnter the project folder
cd my-tambo-appFrequently asked questions
What is the difference between CopilotKit and Tambo?
CopilotKit: A TypeScript toolkit for building chat and generative UI on top of AI agents in web, mobile, and chat apps. Tambo: React toolkit that lets AI agents render your own components as interactive UI. CopilotKit suits developers adding an ai assistant or agent interface to a react or next.js app, while Tambo suits react developers who want an ai chat to show charts, forms, or boards instead of only text.
Are CopilotKit and Tambo free?
CopilotKit: Free and open source. Tambo: Free and open source.
Is CopilotKit or Tambo more popular?
CopilotKit has more GitHub stars (38.5k) than Tambo (11.2k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to CopilotKit and Tambo?
Other options people compare them with include LangGraph, assistant-ui, PageIndex, OpenAI Agents SDK, Page Agent.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.