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by Tepix 65 days ago
Wrong. Both WhatsApp and Signal group chats are E2EE.

Telegram group chats are not. Even 1on1 chats aren‘t E2EE on Telegram by default.

Also, reporting is an issue: If a member of the group "Reports" a message to WhatsApp, a copy of the recent messages in that chat is decrypted and sent to WhatsApp for review to check for terms-of-service violations.