Group chat security
There is end-to-end encrypted chats by default, in both WhatsApp and Signal. Whereas in Telegram, you can keep your chats personal by enabling the ‘secret chat feature’. And it doesn’t offer end-to-end encrypted chats by default.
In all three apps, there is no display of the advertisement. However, Telegram has announced plans to introduce ads to its platforms later.
The screen lock is present in all three apps. Due to this feature as we all know the users can lock over their private chats. And can leave their phone without getting worried.
Talking about backup, WhatsApp has the ability to backs up your chat on third-party cloud platforms, but in the Signal, there is no chat backup option as they are saved on your device itself. But when we talk about Telegram has its in-built cloud backup.
All the three apps offer the disappearing messages feature, But in Telegram you can use it only in the ‘secret chat’ mode.