Wickr - Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender...
VoiceMo - Send your voice messages in an exciting new way!
Burn Note - Burn Note is the name of a continuous private messaging utilizing which you can have an ongoing private discussion with your companions or any individual who is at Burn Note.
Cord - One tap voice chat
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
Yac - Take your time back from Zoom & Slack