Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.
- Group Chat App
- Freemium • Open Source
- Mac
- Windows
- Linux
- Android
- iPhone
- iPad
- Self-Hosted
- Cloudron
+5QKSMS brings a refreshingly beautiful and responsive Material Design touch to the stale state of text messaging.
- Instant Messenger
- Freemium • Open Source
- Android
- Android Tablet
- F-Droid
Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG].
- Instant Messenger
- Free • Open Source
- Android
- Android Tablet
- F-Droid
+4Free and Cross Platform messaging and emailing app that combines common web applications into one.
- Instant Messenger
- Freemium • Proprietary
- Mac
- Windows
- Linux
ArcaneChat is a Delta Chat client and was created with a focus on usability, good user experience, and saving data plan. Also the app usually experiments with new features that eventually might get added to the official Delta Chat client.
- Instant Messenger
- Free • Open Source
- Android
- F-Droid
FluffyChat is an open, nonprofit and cute matrix messenger app for Ubuntu Touch, Android and iOS.
- Instant Messenger
- Free • Open Source
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Snapcraft
- Flathub
- Ubuntu Touch
- F-Droid
- Matrix.org
The next generation communication platform designed for gamers and academics alike. Experience seamless collaboration like never before.
- Instant Messenger
- Free • Proprietary
- Mac
- Windows
- Linux
- Online
+5QUIK is an open source replacement to the stock messaging app on Android. It is a continuation of QKSMS.
- Instant Messenger
- Free • Open Source
- Android
- F-Droid
Linphone is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features.
- Instant Messenger
- Free • Open Source
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
+7Adium 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. Based on the libpurple protocol library, Adium can connect you to any number of messaging accounts on any...
- Instant Messenger
- Free • Open Source
- Mac
An advanced gaming chat platform competitor to Discord with features like calendars, advanced voice chat, and forums to better manage and grow your gaming communities.
- Group Chat App
- Free • Proprietary
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
Offers group video calls, voice calls, and instant messaging with photo sharing, real-time notifications, and location mapping for seamless connectivity.
- Instant Messenger
- Free • Proprietary
- Windows
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Android Auto
- Android Wear
Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between all of them! We think conversation should be easily shared between all of your devices, not trapped as text messages on your phone.
- Instant Messenger
- Freemium • Proprietary
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Blackberry
- iPad
- Software as a Service (SaaS)
+2Franz 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.
- Instant Messenger
- Freemium • Open Source
- Mac
- Windows
- Linux