3 Free and Open-source Im Apps for macOS (Intel and Apple Silicon)

1- BeagleIM

XMPP client for macOS based on TigaseSwift XMPP library

Beagle IM by Tigase, Inc. is a lightweight and powerful XMPP client for macOS.

It provides an easy way to start using XMPP protocol (formelly known as Jabber) if you've never used it before.

Veterans of the protocol will find many features with which they are familiar and a few enhancements.

Supports: OMEMO end-to-end encryption

Read about BeagleIM 's features, license, platforms, and more.

2- ChitChat

Whatsapp client for macOS

A Mac app wrapper around WhatsApp's web client, WhatsApp Web.

The latest version is available here. Need help? Ask me on Twitter here.

Requires OSX 10.10 Yosemite and a WhatsApp Web compatible device.

Read about ChitChat 's features, license, platforms, and more.

3- Franz

free open-source chat and messaging apps

Franz is your messaging app for WhatsApp, Facebook Messenger, Slack, Telegram and many many more.

Read about Franz 's features, license, platforms, and more.