Is there anything better than SimpleX for total anonimity?
Although I also use Molly, a modified version of Signal, even with people that have my number for Signal I still prefer SimpleX for everybody, but unfortunately Molly/Signal is easier for some people.
Especially for things like resetting phone or changing phones, with Molly they know where I am and there's no need for an invite link with SimpleX, but I still grealy prefer it.
Not on the same level as SimpleX. With Briar and Session you have you have the same ID for everybody.
For SimpleX you can create a new random ID with each contact, so if you talk with 8 people, SimpleX will create 8 random ID's and each contact will see you as someone different than how the other contacts see you.