[jakecopp]

Get them onto Element, it's brilliant! [1]. Matrix is an aggressively open garden - it even bridges to other social networks [2].

[1]: https://element.io/

[2]: https://matrix.org/bridges/

[arnoooooo]

I would not call Element brilliant. I have had a hard time getting others to adopt it. Fluffychat (Matrix client as well) is more user-friendly.