Chat apps as widgets

You can embed Slack into a website using a 3rd party tool called Taggbox Widget (free for 2 feeds)

Discord natively supports embedding with its own widget.

In my opinion MS Teams will eventually eat Slack and Discord thanks to easy corporate IT service bundling, so if you’re a glutton for punishment you can apparently embed teams chat with a 3rd party app from the Teams App Store

I’ll update with other potential embeds as I find them.