The most popular alternative is Jitsi, which is both free and Open Source. If that doesn't suit you, our users have ranked 38 alternatives to Fire so hopefully you can find a suitable replacement. Other interesting Fire alternatives are Pidgin (Free, Open Source), Franz (Freemium), Ferdi (Free, Open Source) and Trillian (Freemium).
- Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full encryption that supports protocols such as SIP, XMPP/Jabber, ICQ/AIM, Windows Live, Yahoo!
- Pidgin is an easy to use, multi-protocol chat client client used by millions. Connect to AIM, MSN, Yahoo, XMPP, and more chat networks all at once.
- Franz is a free messaging app / former Emperor of Austria and combines chat & messaging services into one application. Franz currently supports Slack, WhatsApp, WeChat, HipChat and many more. You can download Franz for Mac, Windows & Linux.
- Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between all of them!
- Adium is a free and open source instant messaging application for Mac OS X, written using Mac OS Xs Cocoa API, released under the GNU GPL and developed by the Adium team.
- The goal of Gajim is to provide a full featured and easy to use XMPP client. Gajim works nicely with GNOME, but does not require it to run.
- ICQ is one of the oldest instant messengers. First developed by the Israeli company Mirabilis, sold to AOL, sold again and currenly owned by the Russian "mail.
- Message and video chat with your friends and family for free.Features- Make high-quality video and voice calls on Android and iPhone
- Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols.