Optimus – WordPress Image Optimizer vs Kraken.io Image Optimizer (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
Optimus – WordPress Image Optimizer
30K+ active installs
Free
Kraken.io Image Optimizer
10K+ active installs
Free
Quick Verdict
As of April 2026, Kraken.io Image Optimizer has a higher user rating (4.5/5 from 119 reviews) while Optimus – WordPress Image Optimizer leads in active installations (30K+ vs 10K+). Both are free WordPress plugins. Optimus – WordPress Image Optimizer has accumulated 694K+ total downloads while Kraken.io Image Optimizer has 399K+.
Detailed Comparison
| Metric | Optimus – WordPress Image Optimizer | Kraken.io Image Optimizer | |
|---|---|---|---|
| Rating | 4.2/5 | ► | 4.5/5 |
| Total Reviews | 68 | ► | 119 |
| Active Installs | 30K+ | ◄ | 10K+ |
| Total Downloads | 694K+ | ◄ | 399K+ |
| Support Resolution | N/A | N/A | |
| Last Updated | 1 month ago | ► | 4 weeks ago |
| First Released | 2012 | 2014 | |
| Age | 14 years | 12 years | |
| WP Requires | 4.6+ | 4.9+ | |
| PHP Requires | 5.6+ | 5.6+ | |
| Business Model | Free | Free | |
| Latest Version | 1.6.3 | 2.7.0 |
Rating Breakdown
Optimus – WordPress Image Optimizer
Kraken.io Image Optimizer
Download Trends
Over the past 30 days, Optimus – WordPress Image Optimizer averaged approximately 38 daily downloads while Kraken.io Image Optimizer averaged 208.
Recent Reviews
Optimus – WordPress Image Optimizer Reviews
Not very effective
The 100kb limit of the free version is very limiting and mostly serves like a demo. My disappointment was that even though i had the premium version and i optimized the images, google pagespeed still
Fait le job
Pourquoi perdre du temps quand un outil peut vous en faire gagner… Si vous avez des images trop lourdes qui peuvent ralentir votre site, c’est l’outil idéal. This topic was modified 7 years, 2
You should purchase this plugin!
A simple, fast and easy to use plugin that has great features to offer. I’ve purchased a key for the Pro version a few days ago and converted all my pictures to webP. My blog is faster than ever. If y
Kraken.io Image Optimizer Reviews
Poor Quality
Not worth the time.
Terrible Customer Service
As others are noting here, their customer service is terrible. In fact I’d use the word “non-existent”. After signing up with an account I decided that the service was no longer what I needed and cont
Worst service I’ve encountered
Whatever you do, do not use this service. They will happily charge your credit cars, but when you try to reach them for support, they never respond. Their service is a disgrace.
More Image Optimizer Worth Comparing
Top alternatives in the same category as Optimus – WordPress Image Optimizer and Kraken.io Image Optimizer
Automatically optimize images: bulk compression, lazy loading, WebP/AVIF conversion. With CloudFront image CDN to boost Core Web Vitals & conversions!
Replace 50+ WordPress Plugins: Free Theme Builder, Code Snippets, Image Optimizer (WebP/AVIF), SMTP Email, Security Hardening, Performance & More
Boost the performance of your WordPress site by optimizing your images and videos with the Cloudinary WordPress Plugin. WordPress developers, content …
Frequently Asked Questions
Is Optimus – WordPress Image Optimizer or Kraken.io Image Optimizer more popular?
Which has better ratings — Optimus – WordPress Image Optimizer or Kraken.io Image Optimizer?
Are Optimus – WordPress Image Optimizer and Kraken.io Image Optimizer free?
Which plugin has better support — Optimus – WordPress Image Optimizer or Kraken.io Image Optimizer?
Which plugin is updated more frequently?
Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.