Telegram is by far the best messenger that exists right now.
I created a few public Telegram groups that I often contribute to. macOS/iOS Automation being the biggest one.
I mapped my most visited chats with KM macros that call URL schemes like so:
This lets me jump between many groups in under 1 second time. For other groups I use the channel switcher.
Integram - Integrate Telegram into your workflow.
Telebot - Looks awesome.
Telegrammer - Swift 4.1 with Apple/SwiftNIO.