Telegram is a free cloud-based instant messaging platform.

Signal is the most scalable encryption tool.

ChatSecure is a messaging application for iOS which allows OTR and OMEMO encryption for the XMPP protocol.

Threema is an encrypted instant messaging application for iOS, Android and Windows Phone.

Flock is a communication app for teams. Packed with tons of productivity features, Flock drives efficiency and boosts speed of execution.

Silence.im is an encrypted text messaging service.

Google Allo is an instant messaging mobile app.

Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.

Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss. It is available for iOS, Android, Linux, Windows, macOS and Web browser cl…

Xabber (XMPP and Jabber) is a XMPP client for the Android Operating System.

Conversations is an open source XMPP/Jabber client for the Android platform.

Sicher is a freeware instant messaging application for iOS, Android, and Windows Phone. Sicher allows users to exchange end-to-end encrypted text messages, me…

Wickr is an instant messenger application.