Yac - Take your time back from Zoom & Slack
Echoes - Voice-first messaging for fast & collaborative remote teams
AudioNotes - Easily record and share audio messages from your Mac menubar
WebRTC - WebRTC is a free, open project that enables web browsers with Real-Time Communications (RTC) capabilities via simple JavaScript APIs. The WebRTC components have been optimized to best serve this purpose.
Recordify - Quickly send audio messages to Slack!
Talko - Live & asynchronous voice communications on mobile