Conversity - Easiest way to manage Facebook Messenger chats
Walkie - Walkie is an online communication providing software that allows you to remain in touch with the other persons.
Slack with your Users - Speak to your app's users entirely within Slack
Cord - One tap voice chat
Talkus - Chat with your website users from Slack
Slack Voice Chat by Standuply - Easily record and send voice messages on Slack 🗣️