Jamform - Collect form submissions without a server or database.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
ChannelSync - Discord is great, we know it, but unfortunately it acts as a gateway for information openess.
WhatsHelp - Communicate personally with your customers via Messenger
Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.
Chatra - Live chat software that helps to increase revenue and collect feedback providing an easy way for website owners to talk to visitors in real time.