Comment by celsoazevedo

As someone that uses Telegram almost every day, the sad true is that most messages are not private. Most people simply don't use "secure chats". Not only it's not the default, but encrypted chats also don't work across devices.

So it shouldn't be a surprise that Signal users speak against Telegram. It's simply not private for most people. It's like recommending using Facebook Messenger (pre-E2EE)... privacy minded people won't do that. Signal itself is criticised by other more privacy minded users because it requires a phone number.

Signal doesn't have the best call quality (voice/video) especially on slow connections, sending media can be a pain in the rear, their desktop client is way too simple, they move slowly, etc. Telegram beats them in almost everything, but not privacy...

Between having to trust Durov forever with our texts and system that uses e2ee by default and may or may not (no proof) have some flaw, I think most people that want privacy will use the option that uses e2ee for everything.