A matrix of capabilities of modern messengers with a focus on security

Hi% Username%!

I decided to compile a table of features of modern instant messengers with an eye to security and the threshold of entry. Perhaps this will help someone to choose the right tool for communication.
About what I did - under the cut.

Features / Messenger	End-to-end encryption	Encrypted Groupings	Desktop client with encryption	Encrypted voice calls	Need a server	Id
Telegram	Yes, you need to create a secure chat separately	To the server (Durov can read)	Cutegram	Not	Yes	Tel number, nickname
Signal	Yes (mobile only)	Yes (mobile only)	not yet	Yes	Yes	Tel number
Tox	Yes	Yes (desktop only yet)	Yes	Yes + group	Not	Public key, you need a different one on each instance
Whatsapp	It seems like yes (Android only)	Not	Https	?	Yes	Tel number
Skype	No, the FSB has access	Not	To server	Not	Yes	Login
Viber	No, the FSB has access	Not	To server	?	Yes	Tel number
Jabber + otr (Pidgin, ChatSecure)	Yes	Not	Yes	Not	Yes	Login

Remarks

• By default, Telegram has encryption only to the server, and there is only trust in Durov. Secret chat needs to be cut separately.
• WhatsApp kind of screwed the same encryption as in Signal, but there are no details and it seems only on androids it works
• Signal is the most secure of convenient non-anonymous messengers, but there is no desktop client. Actively sawing a web extension for chrome. I advise you to take a closer look. Low entry threshold.
• Tox is his future, but so far he is very raw. And you need to generate as many Id as you have devices on the network at the same time, otherwise it will fail. But he only has anonymous group encrypted voice conferences (unless the client crashes)
• Jabber + OTR. great security but high entry threshold with tons of settings
• Viber, Skype - only if you do not mind that the authorities read your conversations almost in real time.

UPD
Here is a good comparison plate.