Zulip is described as 'Threaded group chat with topics for live or async collaboration, open-source, supporting self-hosted or cloud use, suited for organized team discussions' and is a very popular instant messenger in the social & communications category. There are more than 100 alternatives to Zulip for a variety of platforms, including Android, iPhone, Web-based, Windows and iPad apps. The best Zulip alternative is Signal, which is both free and Open Source. Other great apps like Zulip are Telegram, Element, Discord and Matrix.
Cnectd is a mobile messaging and social networking application for smart phones. Cnectd lets you chat across iPhone, BlackBerry, Android and Symbian devices. In addition Cnectd allows you to find new friends in your area, share media with your contacts and more.
R&Q is a little instant messaging client for the ICQ protocol, fork of Rejetto's &RQ. It is simple, fast, takes a little more than 1 MB disk space and doesn't need setup.
SafeSwiss The world’s most effective end to end encryption security solution including P2P Voice, encrypted email, encrypted storage, ephemeral text chat, docs share & group chat for mobile phone devices and PC's.
Rebtel is a communication software that enables free calls between Rebtel users and low-cost international calls to non-Rebtel users. It works with WiFi, 3G, and local minutes. The software offers low-cost calls to any phone number, with rates significantly lower than typical...
Free chat rooms no registration. Chat for free in many chat rooms. Meet single people and strangers online in retro style text online chat rooms.
Coco Voice is a Walkie Talkie app to share voice, text, and pictures.
Turn your smart phone into the ultimate push to talk walkie-talkie with TiKL.
xat is a fun social networking site with the coolest online chat box. Make friends, join a group or run your own chat. Over 2500 unique smilies to combine and use. Embed to your blog or page for free (no need to download). Also available on mobile.
RelayBeam is a messaging platform with an innovative multi-port feature for enhanced communication.
WhatsGreen Multi Messenger is the easiest way to chat with friends from Chrome Browser without a phone. With WhatsGreen Multi Messenger you will never miss a message again while working on your PC.
AVAILO is a business communication app for teams. One place for internal and external communications, open groups for your team members, service providers and customers, with real time messaging, share emails, folders and files, in a simple way.
Mycelium (formerly Disclone) is a feature-rich, open source communication app and personal-collaborative hub (drive/notes...).
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