Wickr - Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender...
Cord - One tap voice chat
Confide - On the off chance that you need to get your messages private and encoded then utilize Confide that will fill in as your own and classified courier.
Walkie - Walkie is an online communication providing software that allows you to remain in touch with the other persons.
Bleep - Bleep is an insured and secure messaging application by the Bit Torrent that you can use for valuing the private and safe communications.
Slack Voice Chat by Standuply - Easily record and send voice messages on Slack 🗣️