So we are ending our #WordPress #Telegram series for now, and maybe adding our own plugin to this list later. And the best news in my opinion: #WordPress admits they get important notifications over Telegram and also included sharing button for Telegram natively in Jetpack I believe.
This is already part three of our WordPress Telegram series and we are already near near the end of the series of the https://wordpress.org/plugins/search/telegram/ . As already mentioned Universal Chat looks promising but it is an external service. As we come closer to he first page, results getting better of course.
As promised we are starting a new series about Telegram plugins for WordPress. As you can guess this is still a total niche. And if you search for Telegram plugins on WordPress.org you got 5 sites, but most of them maybe just do something else and have nothing to do with Telegram. And why Telegram? Telegram is a secure messenger (tried to hack it myself, this is why I know this) and most of its clients are the same License than WordPress.