Both are E2EE. Unlike Signal, they also have the benefit of not requiring a phone number, so your account isn’t linked to you that way. In my experience, Session feels more mature, having apps on more platforms and more reliable notifications. However SimpleX has some really nice features, like the ability to have multiple profiles (including hidden profiles).
How about Session or SimpleX?
Both are E2EE. Unlike Signal, they also have the benefit of not requiring a phone number, so your account isn’t linked to you that way. In my experience, Session feels more mature, having apps on more platforms and more reliable notifications. However SimpleX has some really nice features, like the ability to have multiple profiles (including hidden profiles).