mariandz

After creating your personal Telegram bot, you can use the following features: 
– Add the bot to multiple chats and groups 
– Get notifications upon new posts and comments 
– When WooCommerce is installed, you can also get notifications about new orders and reviews 
– Edit and change status of posts, comments, orders, and reviews 
– Browse through the latest posts, comments, orders, and reviews 
In case you are missing any features or have found a bug, just let me know.

TeleAdmin

Manage your WordPress site on the way using Telegram. Receive notifications, accept comments and edit WooCommerce orders.

Yevhen Horbyshyn

This plugin allows you to send Telegram messages when posts are published. You can configure which post types trigger notifications, and customize your bot credentials and chat ID.
<h3>External services</h3>
This plugin connects to an API to send message to Telegram messenger.
It sends the message every time new post of chosen type added. 
This service is provided by Telegram Messenger Inc “Telegram”: Terms of use – https://telegram.org/tos, privacy policy – https://telegram.org/privacy.

HQFam Post Notifier for Telegram

Send Telegram notifications when WordPress posts are published — simple and configurable plugin.

TeleAdmin vs HQFam Post Notifier for Telegram