Blackbam

Create, manage and view snapshots of any post (or custom post type) whenever you want. Like user-managed revisions with a lot of useful functionality.
Features: 
* Create snapshots of any post type including all metadata at any point manually as a secure history and backup of your posts 
* Uses the standard WordPress posts table (like revisions) 
* Uses a custom post status (and therefore works for any post type) 
* Easy snapshot management meta box 
* Create Snapshots comfortably in the publish post box 
* Choose which post types you want to enable the snapshots feature for
PHP Developer API: 
 pos_create_snapshot_from($post_id): Creates a new snapshot for a given post ID 
 pos_delete_snapshot($snap_id): Delete a snapshot by its ID 
 pos_get_latest_snapshot($post_id): Returns the ID of the latest snapshot for a given post ID 
 pos_get_plainview_url($snap_id): Get the URL to the plain snapshot view
This Plugin is sponsored by ready2order GmbH, the company which is producing Austria’s best point-of-sale system. Visit us at https://www.ready2order.com/.
NOTE: The use of a custom post status in WordPress is still in beta. The developers of this plugin are in no possible case responsible for any data loss. 
If you want to be sure nothing happens, backup your database on a regular basis. You should do it anyway.

Post Snapshots

Everything works as expected and I did not hear any compaints yet.

On our live website it has been working great since two months now

Create, manage and view snapshots of any post (or custom post type) whenever you want. Like user-managed revisions with a lot of useful functionality.

selmitec

Selmitec QuickSnap Restore lets you create a “snapshot” before updates or important changes and restore it when needed.
Key features (Free) 
* One-click snapshot. 
* Custom name for each snapshot. 
* Restore with redirect back to the current admin page (stored location). 
* Auto-login of the current user after restore. 
* Saves and restores: database, plugins, and themes. 
* Minimal UI, admin-only.
Where snapshots are stored 
Snapshots are saved under uploads: 
 wp-content/uploads/selmitec-quicksnap-restore/snapshots/
<h3>External services</h3>
This plugin can optionally send notifications via Telegram.
When enabled, it connects to the Telegram Bot API (api.telegram.org) to deliver messages about snapshot/restore events.
<ul>
<li>Service: Telegram Bot API (Telegram Messenger LLP / Telegram FZ-LLC)</li>
<li>What it is used for: sending optional admin notifications to a Telegram chat.</li>
<li>What data is sent: the bot token (in the request URL), chat_id, and the notification text you configure (which may include your site URL if you choose to include it in the message).</li>
<li>When data is sent: only when Telegram notifications are enabled in the plugin settings and a snapshot/restore event triggers a notification.</li>
<li>Terms of Service: https://telegram.org/tos</li>
<li>Privacy Policy: https://telegram.org/privacy</li>
</ul>

Selmitec QuickSnap Restore

Create one-click site snapshots and restore quickly from the WordPress admin area. Minimal UI and lightweight footprint.

Post Snapshots vs Selmitec QuickSnap Restore