FizTool

Fiz Auto Media helps site owners manage common media and publishing tasks from one plugin.
Developed By FizTool. 
Plugin website: https://fiztool.com/
Main features include:
<ul>
<li>Image compression and WebP generation for supported media files.</li>
<li>Bulk compression workflow for existing Media Library images.</li>
<li>Automatic image alt text and description helpers.</li>
<li>Featured image tools for posts without thumbnails.</li>
<li>Duplicate post detection tools.</li>
<li>Auto post scheduling tools using WordPress cron.</li>
<li>Media cleaner tools for scanning and reviewing unused media before cleanup.</li>
</ul>
Fiz Auto Media runs locally inside WordPress and does not require an external account for its included features. If the Featured Image helper is enabled, WordPress may request external image URLs found in post content so those images can be imported into the Media Library after the required upload and edit permissions are confirmed.
The plugin uses WordPress capabilities, nonces, sanitization, escaping, and WordPress filesystem helpers where appropriate.

Fiz Auto Media

Compress images, bulk schedule posts, review duplicate posts, scan unused media, and improve image metadata from one dashboard.

Shane Bishop

The S3 Image Optimizer will optimize all your images in 1-1,000+ Amazon S3 buckets using the EWWW Image Optimizer. Since EWWW IO integrates directly with plugins like WP Offload Media, S3 IO is generally for folks who use a solution other than WP Offload Media to put their images on S3. But, if you have 20 sites sharing an S3 bucket, or have lots of buckets, and you would want to optimize them all from one place instead of 20 different sites, this is the plugin for you.
S3 IO features a web-based bulk optimization process, and a WP-CLI interface for massive buckets. S3 IO works with any S3-compatible storage service including Linode, Backblaze B2 and Digital Ocean Spaces.
You may report security issues through our Patchstack Vulnerability Disclosure Program. The Patchstack team helps validate, triage and handle any security vulnerabilities. <a href="https://patchstack.com/database/vdp/s3-image-optimizer" rel="nofollow ugc">Report a security vulnerability.</a>
<h3>Credits</h3>
Written by <a href="https://ewww.io" rel="nofollow ugc">Shane Bishop</a> with special thanks to my <a href="https://www.iamsecond.com/" rel="nofollow ugc">Lord and Savior</a>.

S3 Image Optimizer

Compress images in Amazon S3 buckets using lossless and lossy optimization methods via the EWWW Image Optimizer.

Fiz Auto Media vs S3 Image Optimizer