WebPajooh

You can show your channel members count in your website, with a function or shortcode. the function can be used in template codes, and shortcode can be used in your posts.

tgStatistics

Ameer Mousavi

Hi, 
Whether you want to receive notifications about your website (e.g. comment submit, user register, new core update and etc.) or you just want to share your posts/products in Telegram Channel; you are welcome to use this plugin. This will help you to integrate Telegram with WordPress.
This plugin based on <a href="http://notifcaster.com" rel="nofollow ugc">Notifcaster</a> service by Ameer Mousavi and allows WordPress site to send notifications to telegram.
Note: You have to turn on WordPress email notifications in order to receive Telegram notifications. Because in this version you will receive the body of any email that WordPrss is sending.
Please feedback and rate to make this plugin better.
Here is a <a href="http://ameer.ir/telegram-for-wp" rel="nofollow ugc">Persian Tutorial</a>

Telegram for WP

Allows WordPress site to send notifications to Telegram. You can also send files/posts/products to Telegram Channel.

tgStatistics vs Telegram for WP