Got it from here : https://infosec.exchange/@mattburgess/111885761552024420
NEW: WhatsApp will soon make it possible to chat with people who use other messaging apps. It’s revealed some more details on how that will work.
— Apps will need to sign an agreement with Meta, then connect to its servers.
— Meta wants people to use the Signal Protocol, but also says other encryption protocols can be used if they can meet WhatsApp’s standards
— WhatsApp has been testing with Matrix in recent months, although nothing is agreed yet. Swiss app Threema says it won’t become interoperable
It would be cool tho if you could. I don’t wanna use WhatsApp but I’m basically forced to because everyone else in my family uses it.
Yeah, for me my family and close friends have no problem because I explained and told I am not going to use Facebook products. But when meeting new people, especially groups of people there is a big barrier.