CopilotKit
★ 31.8k
vs
plasmate
★ 22
CopilotKit vs plasmate
CopilotKit: CopilotKit is a React framework for embedding AI copilots, chatbots, and in-app agents directly into web applications. It provides UI components (chat interface, sidebar, textarea) and backend infrastructure for building agentic frontends — where AI can read and modify application state, take actions, and render generative UI. Supports LangChain, LangGraph, CrewAI, and custom agent backends.; plasmate: Plasmate compiles HTML into a Semantic Object Model (SOM), a structured representation that LLMs can reason about directly. It runs JavaScript via V8, supports Puppeteer via CDP, and produces output that is 10-800x smaller than raw HTML. It is purpose-built for AI agent pipelines, with MCP, Vercel AI SDK integrations, and over 60 ecosystem integrations.
01
TL;DR
Choose CopilotKit if…Adding a context-aware AI copilot to a SaaS product that understands app state
Choose plasmate if…AI agent web browsing and structured data extraction
02
Side-by-Side Comparison
03
Features
CopilotKit01Drop-in React UI components: chat, sidebar, textarea, and generative UI
02AI can read and write your application's frontend state bidirectionally
03Backend adapters for LangChain, LangGraph, CrewAI, and custom agents
04Human-in-the-loop patterns for approving AI actions before execution
05Copilot Cloud hosted option or fully self-hosted deployment
plasmate01Semantic Object Model (SOM) compression: 10-800x smaller than raw HTML
02JavaScript execution via embedded V8 engine
03CDP compatibility for Puppeteer integration
04Native AWP protocol with 7 methods for agent interaction
05MCP tool server for Claude Desktop, VS Code Copilot, etc.
04
Use Cases
CopilotKit↳Adding a context-aware AI copilot to a SaaS product that understands app state
↳Building AI-powered document editors where the agent can directly modify content
↳Embedding a conversational agent in a dashboard that can read and update data
plasmate↳AI agent web browsing and structured data extraction
↳MCP tool server for LLM-based assistants (e.g., Claude Desktop)
↳Vercel AI SDK integration for agent tool calling
05
Best For
CopilotKitMost PopularTrendingEssential
plasmateTrendingBrowser Automation
FAQ
FAQ
What is the difference between CopilotKit and plasmate?
Both CopilotKit and plasmate are in the Browser Automation category. CopilotKit has 31.8k stars, while plasmate has 22 stars.
Which is better, CopilotKit or plasmate?
The best choice depends on your use case. Choose CopilotKit if Adding a context-aware AI copilot to a SaaS product that understands app state, and plasmate if AI agent web browsing and structured data extraction.
Is CopilotKit free or open source?
Yes, CopilotKit is open source on GitHub (MIT).
Is plasmate free or open source?
Yes, plasmate is open source on GitHub (Apache-2.0).
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