Open-source alternatives to Calls

Matrix Client

IRC client

Free email and calendar

OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network

Fast messaging synced across devices

Private messaging, end-to-end encrypted

Equibop is a custom Discord App aiming to give you better performance and improve linux support

Halloy is an open-source IRC client written in Rust, with the Iced GUI library. It aims to provide a simple and fast client for Mac, Windows, and Linux platforms.

A Matrix client for Vim addicts

Offline AI chat tool

Jitsi Meet is an open-source (Apache) WebRTC JavaScript application that uses Jitsi Videobridge to provide high quality, secure and scalable video conferences.

End-to-end encryption for things that matter. Keybase is secure messaging and file-sharing.

Boost your productivity and send better email with Mailspring, the best mail client for Mac, Linux, and Windows.

Googlized Telegram

Access your Mattermost instance with your credentials using the desktop app

Graphical client for the Soulseek peer-to-peer network

Rocket.Chat is the leading open source team chat software solution. Free, unlimited and completely customizable with on-premises and SaaS cloud hosting.

Onion routing based messenger

SimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps 📱!

Stoat for Desktop – application for Windows

The most secure collaboration platform.

A privacy minded and highly configurable Discord client

Legcord is a custom client designed to enhance your Discord experience while keeping everything lightweight.

Low-latency and high quality voice chat primarily intended for use while gaming.

Fully-featured XMPP client.

Caprine is an elegant Facebook Messenger desktop app

Tiny native Discord app

GPT4All is a GUI application for loading and interacting with Generative AI models

Messaging app for WhatsApp, Slack, Telegram, HipChat, Hangouts and many many more.

A chat app that puts you first.