# CopilotKit

> MIT agent-native UI layer — React copilots, AG-UI, MCP

**Category:** AI Agents  
**Pricing:** freemium  
**URL:** https://www.copilotkit.ai  
**GitHub:** https://github.com/CopilotKit/CopilotKit  
**Added:** 2026-09-15

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## The Hook

CopilotKit is the MIT horizontal layer between your agents and users — generative UI, shared state, human-in-the-loop, MCP, and AG-UI.

## What's Good

MIT core (CopilotKit/CopilotKit). React/Next first-class; Angular, Vue, React Native, Slack/Teams channels. Wire LangGraph, Mastra, Google ADK, Strands, OpenAI Agents SDK, and more. MCP client paths and MCP Apps. Docs at docs.copilotkit.ai. Self-host the OSS framework; Cloud Developer is a real free-forever single-dev tier with published caps.

## The Catch

Vs Vercel AI SDK (primitives) and Mastra/LangGraph (backend agent runtimes): CopilotKit is the user-facing agent UI/protocol layer, not the orchestration brain. Pro/Team Cloud and VPC are paid when you outgrow Developer free forever. Self-host keeps the MIT path.

## Verdict

MIT agent UI layer. Self-host free; Cloud Developer free forever is real but capped.