Walkie - Walkie is an online communication providing software that allows you to remain in touch with the other persons.
Smooch.io for Facebook Messenger - Message your customers from Slack, Front, a bot or anywhere!
Cord - One tap voice chat
It's Alive - Create a Facebook bot in minutes
Slack Voice Chat by Standuply - Easily record and send voice messages on Slack 🗣️
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.