Vocalify - Let your website talk, engage with visitors through audio
Voicl - With Voicl you can easily embed voice notes onto your website.
Toky - Toky allows you to improve your business' customer service experience through advanced telephony solutions.
VoiceText for Slack - Voice notes w/ transcription in Slack
Telbee.io - telbee adds voice messaging to podcasts, websites, social media and email to easily hear from and build human relationships with your customers and community - save time, reduce frustration, and gain sales, understanding and fans
Speek - Record and share voice notes on the fly