- has E2E encryption [0] of text, image, audio, video
- does not require phone # [1]
- does not require address book upload
- is not ad-supported
- has open-sourced code for their desktop and mobile clients
- has single msg editing & deletion
[0] derived from the Signal protocol, implemented in Rust, needs more external review/audit, https://wire.com/privacy/[1] using a desktop browser, register at http://app.wire.com with email, then login to mobile app