Walkie - Walkie is an online communication providing software that allows you to remain in touch with the other persons.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Cord - One tap voice chat
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Slack Voice Chat by Standuply - Easily record and send voice messages on Slack 🗣️
GoSquared Live Chat - Beautiful, simple, and free live chat for your website