The best openui alternatives

CopilotKit

CopilotKit/CopilotKit

The Frontend Stack for Agents & Generative UI. React, Angular, Mobile, Slack, and more. Makers of the AG-UI Protocol

Choose CopilotKit if…

• you want the more widely starred option (38.7k)
• you specifically need agent-native or agentic-ai

Shares agent, agents, ai, generative-ui with openui.

cc-haha

NanmiCoder/cc-haha

Local-first cross-platform desktop workspace for Claude Code / agents: multi-agent, Git worktrees, code diffs, skill marketplace, multi-model, Computer Use, task-aware desktop pets, with WeChat, Feishu, DingTalk, Telegram, WhatsApp and H5 access.

Choose cc-haha if…

• you specifically need ai-agent or anthropic

Shares agent, ai, llm, react with openui.

sim

simstudioai/sim

Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.

Choose sim if…

• Apache License 2.0 suits your use better than MIT License
• you want the more widely starred option (30.1k)
• you specifically need agent-workflow or agentic-workflow

Shares agents, ai, react with openui.

mastra

mastra-ai/mastra

Mastra is the modern TypeScript framework for AI-powered applications and agents.

Choose mastra if…

• you want the more widely starred option (29.5k)
• you specifically need chatbots or evals

Shares agents, ai, javascript, llm with openui.

DocsGPT

arc53/DocsGPT

Private AI platform for agents, assistants and enterprise search. Built-in Agent Builder, Deep research, Document analysis, Multi-model support, and API connectivity for agents.

Choose DocsGPT if…

• you would rather work in Python than TypeScript
• you specifically need agent-builder or chatgpt

Shares agents, ai, llm, react with openui.

a2ui

a2ui-project/a2ui

Open-source generative UI framework: agents stream layout data, and apps render it with native components in React, Angular, Lit, Flutter, SwiftUI and Jetpack Compose.

Choose a2ui if…

• Apache License 2.0 suits your use better than MIT License
• you specifically need a2a or a2ui

Shares agent, generative-ui, llm, react with openui.

tambo

tambo-ai/tambo

Generative UI SDK for React

Choose tambo if…

• you specifically need assistant or assistant-chat-bots

Shares agent, agents, ai, generative-ui with openui.

voltagent

VoltAgent/voltagent

AI Agent Engineering Platform built on an Open Source TypeScript AI Agent Framework

Choose voltagent if…

• you specifically need ai-agents or ai-agents-framework

Shares agents, ai, javascript, llm with openui.

agent-native

BuilderIO/agent-native

A framework for building agentic apps

Choose agent-native if…

• you specifically need agent-framework or agent-native

Shares agents, ai, generative-ui, react with openui.

corsair

corsairdev/corsair

Connect your users to their apps

Choose corsair if…

• you specifically need agentic-ai or ai-agents

Shares agents, ai, javascript, llm with openui.

TaskingAI

TaskingAI/TaskingAI

The open source platform for AI-native application development.

Choose TaskingAI if…

• you would rather work in Python than TypeScript
• Apache License 2.0 suits your use better than MIT License
• you prefer a smaller, narrower project to a large one
• you specifically need ai-native or function-call

Shares agent, ai, langchain, llm with openui.

LobsterAI

netease-youdao/LobsterAI

Open-source, desktop-grade AI agent that gets real work done — data analysis, slides, docs, video & web research. Built on OpenClaw; runs tools on your real desktop and takes commands from your phone via WeChat, Feishu, DingTalk & Telegram.

Choose LobsterAI if…

• you prefer a smaller, narrower project to a large one
• you specifically need ai-agent or ai-assistant

Shares agent, llm, react with openui.