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.

WP Socio

Irshad Ahmad

Display the Telegram Public Channel or Group Feed in a WordPress widget or anywhere you want using a simple shortcode.
<h3>Features</h3>
<ul>
<li>Provides an ajax widget to display channel feed</li>
<li>Ajax widget contains a Join Channel link</li>
<li>A separate Join Channel Link/Button</li>
<li>Pulls updates automatically from Telegram</li>
<li>Uses a responsive widget to display the feed</li>
<li>Fits anywhere you want it to be</li>
<li>The received messages can be seen from /wp-admin</li>
<li>Automatically removes deleted messages</li>
<li>Can be displayed using a shortcode</li>
<li>Available as a Gutengerg block</li>
<li>Allows embedding of Telegram public channel messages</li>
<li>Can be extended with custom code</li>
</ul>
<h3>Widget Info</h3>
Ajax Widget 
Goto Appearance > Widgets and click/drag WP Telegram Ajax Widget and place it where you want it to be.
Alternately, you can use the below shortcode.
Inside page or post content:
<pre><code>[wptelegram-ajax-widget username="WPTelegram" width="100%" height="500px"]
</code></pre>
Inside the theme templates
<pre><code><?php
if ( function_exists( 'wptelegram_ajax_widget' ) ) {
 wptelegram_ajax_widget();
}
?>
</code></pre>
or
<pre><code><?php
 echo do_shortcode( '[wptelegram-ajax-widget width="98%" height="700px"]' );
?>
</code></pre>
Legacy Widget 
Goto Appearance > Widgets and click/drag WP Telegram Legacy Widget and place it where you want it to be.
Alternately, you can use the below shortcode.
Inside page or post content:
<pre><code>[wptelegram-widget num_messages="5" width="100%" author_photo="auto"]
</code></pre>
Inside the theme templates
<pre><code><?php
if ( function_exists( 'wptelegram_widget' ) ) {
 $args = array(
 // 'author_photo' => 'auto',
 // 'num_messages' => 5,
 // 'width' => 100,
 );

 wptelegram_widget( $args );
}
?>
</code></pre>
or
<pre><code><?php
 echo do_shortcode( '[wptelegram-widget num_messages="5" width="100%" author_photo="always_show"]' );
?>
</code></pre>
Join Link 
Goto Appearance > Widgets and click/drag WP Telegram Join Channel and place it where you want it to be.
Alternately, you can use the below shortcode.
Inside page or post content:
<pre><code>[wptelegram-join-channel link="https://t.me/WPTelegram" text="Join @WPTelegram on Telegram"]
</code></pre>
Inside the theme templates
<pre><code><?php
if ( function_exists( 'wptelegram_join_channel' ) ) {
 $args = array(
 'link' => 'https://t.me/WPTelegram',
 'text' => 'Join @WPTelegram on Telegram',
 );
 wptelegram_join_channel( $args );
}
?>
</code></pre>
or
<pre><code>
</code></pre>
<h3>Excellent Support</h3>
<h4>Join the Chat</h4>
We have a public group on Telegram to provide help setting up the plugin, discuss issues, features, translations etc. Join <a href="https://t.me/WPTelegramChat" rel="nofollow ugc">@WPTelegramChat</a> 
For rules, see the pinned message. No spam please.
<h4>Get in touch</h4>
<ul>
<li>Website <a href="https://wpsocio.com" rel="nofollow ugc">wpsocio.com</a></li>
<li>Telegram <a href="https://t.me/WPTelegram" rel="nofollow ugc">@WPTelegram</a></li>
<li>Facebook <a href="https://fb.com/WPTelegram" rel="nofollow ugc">@WPTelegram</a></li>
<li>Twitter <a href="https://twitter.com/WPTelegram" rel="nofollow ugc">@WPTelegram</a></li>
</ul>
<h3>Contribution</h3>
Development takes place in our <a href="https://github.com/wpsocio/wp-projects" rel="nofollow ugc">Github monorepo</a>, and all contributions welcome.

WP Telegram Widget and Join Link

Display the Telegram Public Channel or Group Feed in a WordPress widget or anywhere you want using a simple shortcode.

HQFam Post Notifier for Telegram vs WP Telegram Widget and Join Link