XMPP Communication Service Mobile Conversations Platform: Mobile (Android) Encryption: TLS, OMEMO, OTR Website: conversations.im Conversations is a Jabber/XMPP client for Android 4.0+ smartphones that has been optimized to provide a unique mobile experience. ChatSecure Platform: Mobile (iOS) Encryption: TLS, OMEMO, OTR Website: chatsecure.org ChatSecure is a free and open source messaging app that features OTR encryption over XMPP. Xabber Platform: Mobile (Android) Encryption: TLS, OTR Website: xabber.com Xabber is the most popular open-source XMPP client for Android. It supports multiple XEPs, Off-The-Record (OTR) chat encryption and is available in multiple languages. Destop/Laptop Dino Platform: Linux Encryption: TLS, OMEMO Website: dino.im Dino is a modern open-source chat client for the desktop. It focuses on providing a clean and reliable Jabber/XMPP experience while having your privacy in mind. Gajim Platform: Linux / Windows Encryption: TLS, OMEMO, OTR Website: gajim.org Gajim is to provide a full featured and easy to use Jabber/XMPP client. Gajim works nicely with GNOME, but does not require it to run. It is released under the GNU General Public License. Swift Platform: OSX / Windows Encryption: TLS Website: swift.im An elegant, secure, adaptable and intuitive XMPP Client. Available for free on Windows, Mac OSX and Linux. Psi Platform: Linux / OSX / Windows Encryption: TLS Website: psi-im.org Psi is a free instant messaging application designed for the XMPP network. Fast and lightweight, Psi is fully open-source and compatible with Windows, Linux, and Mac OS X. Messages Platform: OSX Encryption: TLS Website: apple.com Messages is an instant messaging software application developed by Apple Inc. for its macOS. Spark Platform: Linux / OSX / Windows Encryption: TLS, OTR Website: igniterealtime.org Spark is an Open Source, cross-platform IM client optimized for businesses and organizations. It features built-in support for group chat, telephony integration, and strong security. It also offers a great end-user experience with features like in-line spell checking, group chat room bookmarks, and tabbed conversations.