WhatsApp, Slack, Discord, Signal, Matrix.org, Threema, Tellonym, Tox, ChatStep, Zulip, Keybase, Burn Note, Confide, Yap Chat, Conion, BitMail, Gryphn Secure Text Messaging, GoldBug, Snapgasm, MyENIGMA, Silent Text, Cashew Secure Messenger, PrivyTalks, Turms Messenger, Secure Chat are some alternatives to Wickr.