If any of y’all were curious of Beeper when it came out (a Matrix backed chat app) but weren’t able to get an invite for whatever reason, then here ya go! Feel free to ask any questions about it if you got any! (No I don’t work for Beeper, just like this more than Element and self-hosting)
Any company that I have to give my username and password for a third party service (and especially one as important as icloud/imessage) ill take a hard pass.
What company are you talking about, and why are you saying that here? Beeper does not take or want your iCloud password.
EDIT: I’m wrong.
Beeper does want you to proxy your iCloud account through a Mac on their network for iMessage. You are logging into your iCloud account through their site. They are in effect using Mac minis in a farm to provide the service based on what I looked into (including self hosting it, but then you can’t use a beeper app, you need your own)
https://help.beeper.com/chat-networks/imessage?from_search=125277302