Tambo: Offers an open-source React orchestration framework for building AI agents with native custom UI components, similar to CopilotKit. CopilotKit records 403,148 monthly visits with +199.4% month-over-month growth and Freemium pricing. Tambo records 7,034 monthly visits with +3.7% growth and Freemium pricing.
Open-source frontend stack for building AI agents and copilots inside your own product
An open-source toolkit for adding AI agents to your React app
| Dimension / Metric | | |
|---|---|---|
| Official Domain | copilotkit.ai | tambo.co |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 403.15K (403,148) | 7.03K (7,034) |
| MoM Traffic Delta | +268.49K (+199.4%) | +250 (+3.7%) |
| Primary Market & Share | 🇺🇸 United States (18.9%) | 🇺🇸 United States (64.9%) |
| Direct Visits / mo | 179.26K | 2.78K |
| User Rating | 4.6 | 4.3 |
| 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.
An open-source toolkit for adding AI agents to your React app
Register your existing React components once and the agent renders them with the correct props, inheriting your styling, design system and business logic instead of inventing new markup.
Streaming, message threads, cancellation, error states, conversation storage and component state are handled for you, so AI features do not require rebuilding core app infrastructure.
The agent inherits the signed-in user's permissions and session, keeping AI features inside your existing security and authorisation boundaries.
Model Context Protocol integration on both sides connects the agent to external tools and data sources, with MCP OAuth support for authenticated servers.
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
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Delivers a managed platform for building and deploying conversational agents, though less focused on open-source frontend React UI kits.
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Free / Open-sourceThe open-source collaboration OS where people and AI agents work in one shared workspace.
