Yes, you cannot use it if you don't want your chats to pass through a third party server.
But maybe you can try out the "secret chat" feature with auto destroy feature.
The traditional options have already been listed by others here. I just wanted to tell something which is easy to setup and also reliable.
You can use "https://telegram.org" telegram messsenger.
It works flawlessly from the cli.
Yes, you cannot use it if you don't want your chats to pass through a third party server. But maybe you can try out the "secret chat" feature with auto destroy feature.
The traditional options have already been listed by others here. I just wanted to tell something which is easy to setup and also reliable.