Comment by grishka

Telegram is as secure as it can possibly be without the security requiring compromises and leaking into the UX. I thought that was clear to anyone who has ever used it. If you require 100% bulletproof security and are willing to compromise on convenience, it's not for you.

Since this thread is about XMPP, Telegram's security is effectively the same as XMPP over TLS, maybe a bit better because there isn't a trusted third party (the CA).

> All voice can be E2E thru servers, like Signal does.

I know that. In fact, I built the first VoIP implementation for Telegram, libtgvoip, myself from scratch. Relay servers add delay, can run out of capacity, and cost money in bandwidth. Of course relays are still used if a P2P connection can not be established (libtgvoip always started the call through the relays and only switched to P2P if pings went through and RTT was lower, that took at least several seconds before enough statistics was gathered).