Discord is introducing passwordless login through biometric passkeys, such as Face ID and Touch ID. Also, Discord is migrating audio and video calls (but not text messaging) to a new system that features end-to-end encryption by default.
WhatsApp has launched a redesigned and improved experience for Mac users. The new native app adds video group calling with up to 8 people and up to 32 people on audio calls.
Viber uses end-to-end encryption on all 1-to-1 and group messages. It also features disappearing messages and the ability to password-protect your chats. Viber is available for all major desktop and mobile OS.