[tiwil]

..., but I've heard amazing reviews about Telegram.

I haven't checked if it's true or not. Someone stated that Telegram doesn't apply end-to-end encryption (E2EE) automatically, while Whatsapp does. This should be manually enabled by users in the settings, but I cannot find one in my app. Either E2EE is really automatically turned on or it just doesn't allow me to turn it on.

Telegram caught ISIS members that was using their services. They say all the communication was through Telegram. This shouldn't be possible if Telegram have E2EE (even though they claim it) since only each device can encrypt the message.