Monal IM
Open source XMPP/Jabber client.
17 Alternatives To Monal IM
Adium
Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.
Apple Mail
There’s big news attached.
Conversations
XMPP client designed with ease of use and security in mind
Disa
Disa is your new messaging hub.
Facebook Messenger
Facebook Messenger is a faster way to message.
Gajim
Full featured and easy to use Jabber client
Jitsi
Open-source video calling and chat platform.
Pidgin
Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.
Signal
Fast, simple & secure messaging. Privacy that fits in your pocket.
Slack
A messaging app for teams who see through the Earth!
Telegram
Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Tox
Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
Trillian
Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.
WhatsApp
WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Wire
Private & Secure Messenger
Zoom
Zoom unifies cloud video conferencing, simple online meetings, group messaging, and a software-based conference room solution.