Whatever you do, no matter how curious you get, do not use Beeper under any circumstances, it's a matrix fork that can communicate with other chat apps. It does this by storing every single one of your login credentials on a server in Germany, a country that has compelled supposedly private services into providing them user info before. The difference here is that if Beeper gets compelled by Germany into giving up user data it won't just be one of your accounts that gets exposed, it'll be every single account you have as its service works by connecting to your messaging account and acting like another full instance of the app in question.
To test the service, I used an alt Telegram account I have, knowing full well that if Beeper tried anything odd Telegram would alert me beforehand, and sure enough they requested a full export of all my account data to some datacenter in Germany. And to make matters worse, they are now owned by the same people who own Wordpress and Tumblr.
This service has more red flags than the great leap forward, stay as far away from this service as humanly possible.