We Are Volume

Post Sync Manager lets you move posts between your local, staging, and production WordPress sites with a single click — directly from the Gutenberg editor.
Free features: 
* Push and pull posts, pages, and custom post types between environments 
* Sync status indicator (in sync, remote newer, local newer, conflict) 
* Secret-key authentication between sites 
* Full sync log with pagination
<a href="https://postsyncmanager.com" rel="nofollow ugc">Pro version</a> features: 
* Bulk sync page with per-row push, pull, and status check
<h3>External Services</h3>
This plugin communicates only between your own WordPress sites when pushing or pulling posts. No data is routed through any third-party server.
<ul>
<li>What is sent: post content, post meta, and media attachments belonging to the post being synced</li>
<li>Where it goes: directly to the remote WordPress site URL you configure in Settings</li>
<li>Authentication: requests are authenticated with a secret key you set — no external accounts required</li>
</ul>

Volume Post Sync Manager

Push and pull individual posts between WordPress environments.

caspio

Caspio is an online database featuring point-and-click tools for designing database tables, forms, reports, charts, and sophisticated business applications. Applications can be created without programming, and embedding them into a web page is as easy as copying and pasting a code snippet.
The Caspio Deployment Plugin allows you to embed Caspio apps seamlessly on any WordPress post or page, simply by pasting the provided shortcode.
For information about Caspio, visit the official website at <a href="http://www.caspio.com" title="Caspio Official Website" rel="nofollow ugc">http://www.caspio.com</a>.

Caspio Deployment Plugin

Enables shortcodes for embedded deployment of Caspio database applications.

Volume Post Sync Manager vs Caspio Deployment Plugin