Chat UIs & Application Layer

Front-ends, chat interfaces and app scaffolds.

Chat apps

Cinnamon/kotaemon - Open-source RAG tool for chatting with documents.
chatchat-space/Langchain-Chatchat - RAG and agent chat over local LLMs with a web UI.
xxnuo/open-coreui - Rust rewrite of Open WebUI with a much smaller memory footprint.
outsourc-e/hermes-workspace - Web workspace with chat, terminal, memory and skills for Hermes Agent.
LibreChat-AI/LibreChat - Enhanced ChatGPT Clone: Features Agents, MCP, Skills, DeepSeek, Anthropic, AWS, OpenAI.
lobehub/lobehub - LobeHub is your Chief Agent Operator, organizing your agents into 7×24 operations by hiring.
ChatGPTNextWeb/NextChat - Zero-config AI chat assistant. No API key needed — sign up and instantly chat with GPT-5.
Mintplex-Labs/anything-llm - Stop renting your intelligence. Own it with AnythingLLM. Everything you need for a powerful local-first agent experience.
huggingface/chat-ui - Hugging Face's open chat UI; the reference self-hosted ChatGPT-style frontend.
ai-shifu/ChatALL - Chat with all AI bots concurrently in one UI.
GaiZhenbiao/ChuanhuChatGPT - GUI for ChatGPT API and LLMs with agents and file QA.
MatthiasLubbertsen/HatGPT - ChatGPT-style UI clone running on HackClub AI.
Karthik7013/chatgpt-clone - Next.js + shadcn chat app on the Vercel AI SDK.
arc53/DocsGPT - Private RAG chat platform for documents and enterprise search.
bionic-gpt/bionic-gpt - On-premise enterprise RAG chat with private data.
open-webui/open-webui - Self-hosted chat UI for Ollama and OpenAI-compatible backends.

Desktop & terminal clients

open-webui/desktop - Desktop app packaging Open WebUI for running local and remote models.
oobabooga/textgen - Open-source desktop app for local LLMs. Text, vision, tool-calling, OpenAI/Anthropic-compatible API. 100% private.
janhq/jan - Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.
CherryHQ/cherry-studio - Cross-platform AI desktop client with multi-provider support and MCP tools.
50BytesOfJohn/hanoki - Electron AI chat app with branching conversations.
RunanywhereAI/runanywhere-electron - On-device LLM, vision, speech and RAG desktop app.
adamaoc/grokforge - Electron workspace for a multi-root coding agent.
teddashh/multi-ai-chat-desktop - Tauri app orchestrating ChatGPT, Claude, Gemini and Grok.
Calculator5329/GatesAI-Chat - Local-first Tauri chat with Claude-Code-style agency.
assistance-micro-design/Zileo-Chat - Multi-agent Tauri chat with MCP tools and SurrealDB.
eaonlabs/eaon-desktop - Tauri AI chat with agent mode and an Ollama model library.
ripperhe/Bob - macOS translation and OCR app with LLM plugins.
nextai-translator/nextai-translator - Browser extension and desktop AI translator app.
chatboxai/chatbox - Cross-platform desktop AI chat client for multiple providers.
olliedoganay/AtlasChat - Desktop app for chatting with local Ollama models.
roojs/OLLMchat - GTK and terminal Ollama chat client with tool support.
qwersyk/Newelle - Linux virtual assistant with voice and chat interface.
aandrew-me/tgpt - Terminal-based AI chatbot with free providers.
Jeffser/Alpaca - GTK client for chatting with local and online AI models.
josStorer/RWKV-Runner - Desktop manager and runner for RWKV models with OpenAI API.
Renset/macai - Native macOS AI chat app supporting many providers.
szczyglis-dev/py-gpt - Desktop AI assistant with chat and agent mode for many providers.
OpenAgentPlatform/Dive - Desktop MCP host application that connects tool-calling LLMs to MCP servers.
lencx/ChatGPT - ChatGPT desktop app for Mac, Windows and Linux.

Mobile clients

cogwheel0/conduit - Native iOS and Android client for Open WebUI and OpenAI-compatible backends.
jiayueshiliuqi/MoFa - Mobile-first LLM chat client for Android.
timmyy123/LLM-Hub - Open-source mobile app for on-device LLM and media generation.
a-ghorbani/pocketpal-ai - Run language models directly on your phone.
gluonfield/enchanted - iOS and macOS app for private self-hosted LLMs.
nobodywho-ooo/NobodyWho-Chat - Fully offline private AI assistant for iOS and Android.
rikkahub/rikkahub - Android app for chatting with multiple LLM providers.
JHubi1/ollama-app - Modern multi-platform client for Ollama chat.
aws-samples/sample-mobile-ai-assistant - Cross-platform mobile AI assistant app built with React Native.

AI search & research

miurla/morphic - AI-powered search engine with a generative UI.
ItzCrazyKns/Vane - AI-powered answering engine (formerly Perplexica).
binary-husky/gpt_academic - LLM interface optimized for paper reading and writing.
dzhng/deep-research - AI research assistant with an iterative deep-research UI.
u14app/deep-research - Deep research on any LLM with SSE API and MCP server.

Character & roleplay

SillyTavern/SillyTavern - LLM frontend for power users: characters, lorebooks, extensions.
agnaistic/agnai - Multi-user AI chat platform for fictional characters.
kwaroran/Risuai - User-friendly LLM roleplay and character chat software.
steve02081504/fount - Programmable agent runtime for AI characters and immersive chats.

Bots & support platforms

father-bot/chatgpt_telegram_bot - Feature-rich ChatGPT Telegram bot frontend.
Tiledesk/tiledesk - Open-source conversational platform with live chat and chatbots.
NaomiProject/Naomi - Open-source platform for voice-controlled always-on assistants.
theopenconversationkit/tock - Open-source toolkit for building conversational AI assistants.
chatwoot/chatwoot - Open-source omnichannel live chat and support desk.

AI workspaces

u14app/neo-chat - Local-first AI chat workspace with agents, plugins, search and RAG.
AppFlowy-IO/AppFlowy - AI collaborative workspace; open Notion alternative.
toeverything/AFFiNE - Next-gen knowledge base with an AI copilot.
odysseus-dev/odysseus - Self-hosted AI workspace.
cloudflare/cloudflare-os - Agent workspace on Cloudflare Workers for documents, apps and agents.