I've been using Signal for years now and although it still has its flaws (requirement for a phone number, PIN number debacle), it is IMHO the best alternative a

I've been using Signal for years now and although it still has its flaws (requirement for a phone number, PIN number debacle), it is IMHO the best alternative and I've moved my sginificant other, friends and families towards it. Combined with signal-cli (https://github.com/AsamK/signal-cli.git https://github.com/AsamK/signal-cli.git) you can easily set up your own files & messaging upload. For instance, I've created an automatic upload to a Google Photos album for my family group chat and they love it !