Secure Messengers

WhatsApp banned on House staffers' devicesWhatsApp banned on House staffers' devices, The CAO said that Microsoft Teams, Amazon Wickr, Signal, iMessage and FaceTime are all acceptable alternatives to WhatsApp. 

privacy messenger software and apps news 

default end-to-end encryption 

9 Messaging Apps With End-to-End Encryption: Facebook Messenger, WhatsApp, iMessage And More

Default: WhatsApp (online web-interface), iMessage/Google Messages, LINE, Viber, Signal 

Line: image/video from X/twitter Instagram Facebook Tiktok LinkedIn? (copy gif)

Facebook Messenger: X/twitter Instagram Facebook Tiktok LinkedIn (copy gif)

iMessage: X/twitter Instagram Facebook Tiktok? LinkedIn? (copy gif)

EFF Secure Messaging Scorecard: v 1.0 WhatsApp, Signal, iMessage
Surveillance Self-Defense 

Signal Protocol, Signal App for iOS, Android, Desktop, (WhatsApp always activated, Facebook Messenger Secret Conversation on iOS and Android, Google Allo Incognito Mode, Google Messages, Microsoft Skype Private Conversations)

Rakuten Viber uses a similar protocol 

Wire and Wickr for enterprise

Apple iMessage SMS Text
Wickr
Telegram (messaging service), secret chats only
Elliptic-curve Diffie–Hellman ECDH: LINE letter sealing default End-to-end encryption

No End-to-end encryption: Discord, SnapChat, Instagram, TikTok, WeChat

Video Conference/Audio/Voice/Windows/Mac/iPhone/Android: Google Hangouts -> Chat, Meet (Duo), Skype, Facebook Messenger
mobile-only: WhatsApp, Instagram, Snapchat

Hangouts, LINE, QQ, SnapChat, WeChat

Group chat problem