Chat Application GitHub Repositories (2026) · Open Source Tools

Simple, open source team messaging platform

A modern remake of Hotline for macOS, iOS, and iPadOS.

Live Helper Chat - live support for your website. Featuring web and mobile apps, Voice & Video & ScreenShare. Supports Telegram, Twilio (whatsapp), Facebook messenger including building a bot.

A lightweight SwiftUI chat UI framework with 11 built-in message types, 8 themes, and cross-platform iOS/macOS support

Multiplatform Matrix chat client

🤖 Wire client for Android

DCTS is an ambitious project with the goal to offer absolute independence through software with a no-bullshit mindset completely for free and with a heavy focus on self-hosting, decentralization and ease of use.

This is the main repository for the OpenChat application which runs on the Internet Computer

Yet another Telegram/Zoom/Skype/Jitsi/RocketChat/Discord/OpenMeetings/BigBlueButton/Teams/Mattermost/etc... killer

An open-source team messenger for groups of up to 30, with spaces, threads, files and voice notes. Built with Next.js and PostgreSQL, deployed on Tofu.