ChatSecure
ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.
21 Alternatives To ChatSecure
Bitmessage
Bitmessage Wiki
Conversations
XMPP client designed with ease of use and security in mind
Disa
Disa is your new messaging hub.
Facebook Messenger
Facebook Messenger is a faster way to message.
Jitsi
Open-source video calling and chat platform.
LINE
LINE is a Japanese proprietary application for instant messaging on smartphones and PCs.
Nimbuzz
Get the latest, headlines, breaking, regional news fast.
Pidgin
Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.
Signal
Fast, simple & secure messaging. Privacy that fits in your pocket.
Slack
A messaging app for teams who see through the Earth!
Telegram
Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Threema
A secure, end-to-end encrypted Swiss instant messenger with a focus on privacy.
Tox
Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
Trillian
Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.
WhatsApp
WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Wickr
Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender…
Wire
Private & Secure Messenger
Xabber
Open source Jabber (XMPP) client with multi-account support, clean and simple interface.
Zulip
Powerful open source group chat