AG-UI

AG-UI is an open protocol for bringing AI agents into frontend applications and managing user interactions.

AG-UI is an open protocol designed to bring AI agents into frontend applications. It provides the building blocks needed to handle user-facing agents that run long-running tasks, stream intermediate work, and control application UI nondeterministically. The protocol supports structured and unstructured input and output like text, voice, tool calls, and state updates. It is built for developers who need user-interactive composition where agents can call sub-agents recursively. AG-UI includes a specification, SDKs, clients, and supported integrations for direct connection to LLMs, agent frameworks, infrastructure, and deployment tools.

AG-UI at a glance

Best for: Software engineer
Runs on: Web, API, open source
Pricing: Free
Released: May 2025
Category: AI coding tool
Website: ag-ui.com

Key features

Protocol specification
SDKs for development
Client compatibility
Generative UI support
Direct LLM integration
Agent framework partnerships
Event handling

Use it for

Build agentic applications
Build new AG-UI integrations
Build AG-UI compatible clients

Alternatives to AG-UI

Genkit — Provides unified APIs and local developer tools for AI application workflows.
Future AGI — Debug, test, and protect AI agents using simulations, tracing, and guardrails.
AG2 — Builds and orchestrates multi-agent AI systems with universal interoperability.
AGiXT — Builds autonomous agents with integrated memory and web capabilities.
assistant-ui — Builds production AI chat interfaces quickly with React components and runtimes.
AI SDK — Switch providers easily and stream real-time responses without custom parsing.
Agno — Build your agents once and serve them across multiple platforms.
OpenUI Standard — Renders generative UI three times faster with sixty-seven percent fewer tokens than JSON.
Composio — Equips AI agents with tools, managed user auth, and sandboxes across 1,500+ apps
jevgrep — Reduces coding agent costs by providing targeted, relevant repository context.
AGBoss — It offers static verification and strict decorator components for reliable AI agents.
AgentGrid — Centralize multiple AI coding agents and development tools on one interactive canvas.

All AG-UI alternatives