I just started using @delta and it's just great!
Quick and straigthforward sign-up process, very cool features, no ads, no AI crap, allows text, image and voice messages, groups, multiple accounts. And free! (based on donations).
Everything is end to end encrypted, can be synced across devices and zero personal data is required whatsoever to create an account (no phone number, no email). Using standard yet powerful chatmail relays.
My daughter needs to communicate with a correspondent in another country, she has no phone but can use a laptop, so this is perfect. Also we can create a family group 馃槉