If you haven’t heard about it, Telegram is a secure WhatsApp alternative. You can read more about Telegram from an earlier article here. Telegram exposes APIs for clients and a Pidgin plugin is available to use Telegram from the Linux desktop. However, the service was lacking a native client on Linux.
Telegram has now released its own Qt based native client on Linux, named Telegram Desktop. The look and feel closely follows that of the web client.
The package can be downloaded directly from the website (linked below).
Webpage: Telegram Desktop