Xabber

Open source Jabber (XMPP) client with multi-account support, clean and simple interface.

21 Alternatives To Xabber

Adium

Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.

BitMail

Secure decentral P2P Email
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ChatSecure

ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.

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
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Google Duo

Google’s answer to Facetime, high-quality video calling on iOS and Android.

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.

Telegram

Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
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Threema

A secure, end-to-end encrypted Swiss instant messenger with a focus on privacy.

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.
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Viber

Free and secure calls and messages to anyone, anywhere. Keep your conversations going no matter where you are.

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

YakYak

Desktop client for Google Hangouts
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Zulip

Powerful open source group chat