Best Chat UI Top 20

Open WebUI is a feature-rich, user-friendly self-hosted AI platform supporting Ollama and OpenAI-compatible APIs, with RAG, agents, and MCP capabilities.

NextChat is a lightweight, cross-platform AI assistant client supporting GPT-4, Claude, Gemini and more, with Web, desktop, and mobile experiences.

Run Local LLMs on Any Device. Open-source and available for commercial use. Provides fully offline local inference and chat for AI agents.

Lobe Chat is an open-source ChatGPT-style chat application with a plugin system and multi-model support, suitable as an agent conversation interface.

The ultimate space for work and life to find, build and collaborate with agent teammates that grow with you, enabling multi-agent collaboration and team design.

AnythingLLM is an all-in-one AI productivity app with a self-hosted chat UI, RAG knowledge base, AI agents, and multi-model management, privacy-first with zero configuration.

The agentic development environment built for coding with multiple AI agents, providing a next-generation terminal experience.

Open-source frontier voice AI from Microsoft, providing high-quality speech synthesis and recognition for building real-time conversational voice agent applications.

The original local LLM interface supporting text generation, vision, tool-calling, and training with both a web UI and API. Runs 100% offline and private.

Cherry Studio is an AI productivity studio with smart chat, autonomous agents, and 300+ assistants, providing unified access to frontier LLMs.

Jan is an open source alternative to ChatGPT that runs 100% offline on your computer, supporting multiple local LLMs with a full desktop chat UI and API server.

Chatbox is a powerful cross-platform AI client supporting OpenAI, Claude, Gemini, and other LLMs with desktop and mobile apps.

A local knowledge base RAG and Agent application platform built on Langchain with support for ChatGLM, Qwen, Llama and other LLMs, offering conversation, knowledge base management, and agent capabilities.

LibreChat is an enhanced open-source ChatGPT clone featuring Agents, MCP tools, multi-model support, code interpreter, AI search, and more.

Khoj is a self-hostable AI second brain that answers questions from the web or your docs, builds custom agents, schedules automations, and performs deep research.

Chatbot UI is an open-source AI chat interface supporting OpenAI, Claude, Gemini and more, with a modern conversation UI and flexible deployment options.

An AI Agent assistant that integrates multiple IM platforms, LLMs, plugins and AI features, supporting QQ, Telegram, Discord and more.

A lightweight AI assistant platform running securely in containers. Connects to WhatsApp, Telegram, Slack, Discord, Gmail with memory, scheduled jobs, and built on Anthropic's Agents SDK.

Sim is a platform to build, deploy, and orchestrate AI agents with a visual low-code workflow editor, supporting OpenAI, Anthropic, DeepSeek and more for enterprise agent orchestration.

LLM Frontend for Power Users with multi-model support, rich role-playing features, extensible plugin system, and local deployment.