petro64

Plugin to trigger <a href="https://instantview.telegram.org/" rel="nofollow ugc">Telegram Instant View</a> for all Blog posts.
Principal: it detects Telegram bot and returns special template for posts, to trigger Instant View.
<ul>
<li>No template submitting required.</li>
<li>No special links required.</li>
<li>Compatable with any cross-posting systems.</li>
</ul>
Original Telegram InstantView templates registry appears to be dead, my template was not reviewed and submitted in over 1 year. This plugin solves this issue server-side.
<a href="https://t.me/petro_ws" rel="nofollow ugc">My telegram channel with plugin active</a>.
<a href="https://github.com/petrows/wp-tg-instantview" rel="nofollow ugc">Project sources on Github</a> (please submit issues there).

TG-InstantView

This plugin triggers Telegram Instantvew for all posts, no special links required.

iTRON

igortron

This plugin lets you send Contact Form 7 messages to Telegram chats via a bot. Setup takes just a few steps:
<ol>
<li>Create a Telegram bot (<a href="https://core.telegram.org/bots#3-how-do-i-create-a-bot" title="Telegram docs" rel="nofollow ugc">how to</a>).</li>
<li>Create a bot in the plugin UI.</li>
<li>Paste the bot token into the bot form (PHP constants also available).</li>
<li>Create a channel in the plugin UI — it links your Contact Form 7 forms to Telegram chats.</li>
<li>Add users to the subscriber list by sending the <code>/cf7tg_start</code> command to your bot. To add a group, first add the bot to the group, then send <code>/cf7tg_start</code> in that group.</li>
<li>Approve or decline subscription requests on the Contact Form 7 → CF7 Telegram settings page.</li>
<li>Configure the channel: choose which forms to send messages from.</li>
</ol>
<h4>Hooks and constants</h4>
Filter <code>wpcf7tg_skip_tg</code> 
Use it to skip sending a Telegram message.
Filter <code>wpcf7tg_markdown</code> 
Use it to customize the allowed Markdown tags.
This plugin uses <a href="https://core.telegram.org/api" title="Telegram docs" rel="nofollow ugc">API Telegram</a> and sends remote HTTP requests to Telegram servers to deliver notifications.

Message Bridge for Contact Form 7 and Telegram

The best plugin to connect your CF7 form to Telegram. This is a lightweight plugin that also parse your HTML tags into markdown to format well done the output messages. 

Good job! 

A lightweight plugin to connect CF7 to Telegram

After the plugin update, the shortcode used in CF7 forms was removed. As a result, it is now displayed as plain text inside the form.
When releasing such updates, it is important to provide migrations and maintain backward compatibility. If functionality is removed, a fallback or automatic replacement mechanism should be left in place to avoid breaking existing forms.

Shortcode removed without migration

Deliver Contact Form 7 submissions to Telegram instantly via a bot.

TG-InstantView vs Message Bridge for Contact Form 7 and Telegram