Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
AudioNotes - Easily record and share audio messages from your Mac menubar
Chadder - Encrypted messaging app
Yac - Take your time back from Zoom & Slack
Crypho - End-to-end-encrypted messaging and file sharing
Recordify - Quickly send audio messages to Slack!