VoiceText for Slack - Voice notes w/ transcription in Slack

Heyoya - Voice comments for websites & blogs

Einote - Einote is a Chrome extension that allows Internet users to take notes on the fly with their voice right from any webpage.

Commenze - Fully customizable comment sections for any website

Phonic.ai - Phonic is the easiest way to collect audio or video in an online survey. Designed for market research teams, startups and academic researchers.

Cusdis - Open-source, lightweight comment system for your website