wpautosave

“Wp-autosave” plugin is for automatically saving posts being written in the Classic Editor
Note: 
This plugin works as an additional module to the <a href="https://wordpress.org/plugins/classic-editor/" rel="ugc">Classic Editor</a> plugin by <a href="https://github.com/WordPress/classic-editor/" rel="nofollow ugc">WordPress Contributors</a> since <a href="https://wordpress.org/support/wordpress-version/version-5-0/" rel="ugc">WordPress version 5.0+</a>, because the original Classic Editor was replaced with a new editor – Gutenberg. 
So the original Classic Editor plugin is required to work with WP-Autosave plugin for all actual WordPress versions.
In case of older versions of WordPress (<5.0), the original Classic Editor plugin is not required because Classic Editor is used by default.
Major features of plugin: 
– Auto-save post to drafts at regular time intervals by multipart requests. (To check the functionality it’s enough to have the rights to create an entry in the wp-blog (you can test through a user-account) – you will see all requests through the developer tools or some other tools) 
– Intellectual immediately auto-save post to drafts when you change the text in the editor 
– You can attach a time-stamp to request through the settings of the plugin (appendix time of saving in the query) 
– You can set your auto-save interval 
– You can choose the type of saving – by time intervals or when content is changed

Wp-autosave

"Wp-autosave" plugin is for automatically saving posts being written in the Classic Editor

Savelo Form Autosave silently saves everything visitors type in your forms — text, email, number, textarea, select, checkbox, radio — and brings it back if they navigate away and return, close the tab by accident, or their browser crashes.
All data is stored exclusively in the visitor’s own browser (localStorage). Nothing is ever sent to your server. Zero database queries on the front end.
<h4>Features</h4>
<ul>
<li>Universal form support — works with any HTML <code><form></code> element</li>
<li>Smart exclusion — automatically skips login, registration, password reset, and WooCommerce checkout forms</li>
<li>Security-first — never saves password fields; respects <code>autocomplete="off"</code></li>
<li>Contact Form 7 — saved draft is cleared automatically after a successful AJAX submission</li>
<li>Configurable expiry — 1 to 90 days; expired drafts are cleaned up silently</li>
<li>Restore notification — optional, auto-dismissing, fully customisable message</li>
<li>Clear on submit — optionally delete the draft when the form is submitted</li>
<li>Custom exclusions — exclude any form by CSS selector, by adding the <code>savelo-exclude</code> class, or the <code>data-savelo-exclude</code> attribute</li>
<li>Zero front-end dependencies — vanilla ES5 JavaScript, no jQuery required</li>
<li>Assets on demand — scripts and styles are never loaded in wp-admin</li>
<li>Translation ready — <code>.pot</code> file included</li>
<li>Clean uninstall — all plugin data removed when you delete the plugin</li>
</ul>
<h4>Privacy</h4>
All form data is stored in the visitor’s own browser via the localStorage API. No data is transmitted to your server or any third party. Compatible with GDPR-aware workflows. Users can clear their localStorage at any time via their browser settings.
<h4>How to exclude a form</h4>
<ol>
<li>Add <code>data-savelo-exclude</code> attribute directly to the <code><form></code> tag, or</li>
<li>Add the CSS class <code>savelo-exclude</code> to the <code><form></code> tag, or</li>
<li>Enter a CSS selector in Settings → Form Autosave → Exclude Forms</li>
</ol>

Savelo Form Autosave

Automatically saves form data to localStorage and restores it when the visitor returns. Zero server load. Works with any HTML form.

Wp-autosave vs Savelo Form Autosave