ShortPixel Image Optimizer – Optimize… vs Robin Image Optimizer – Unlimited Image… (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
ShortPixel Image Optimizer – Optimize…
300K+ active installs
Free
Robin Image Optimizer – Unlimited Image…
100K+ active installs
Free
Quick Verdict
As of April 2026, ShortPixel Image Optimizer – Optimize… has a higher user rating (4.5/5 from 804 reviews) and leads in active installations (300K+ vs 100K+). Both are free WordPress plugins. ShortPixel Image Optimizer – Optimize… has accumulated 18M+ total downloads while Robin Image Optimizer – Unlimited Image… has 2.1M+. Robin Image Optimizer – Unlimited Image… has a higher support resolution rate (100% vs 100%).
Detailed Comparison
| Metric | ShortPixel Image Optimizer – Optimize… | Robin Image Optimizer – Unlimited Image… | |
|---|---|---|---|
| Rating | 4.5/5 | ◄ | 4.4/5 |
| Total Reviews | 804 | ◄ | 125 |
| Active Installs | 300K+ | ◄ | 100K+ |
| Total Downloads | 18M+ | ◄ | 2.1M+ |
| Support Resolution | 100% | 100% | |
| Last Updated | 1 week ago | ◄ | 3 weeks ago |
| First Released | 2014 | 2018 | |
| Age | 12 years | 8 years | |
| WP Requires | 4.8.0+ | 5.6+ | |
| PHP Requires | 7.4+ | 7.4+ | |
| Business Model | Free | Free | |
| Latest Version | 6.4.4 | 2.0.4 |
Rating Breakdown
ShortPixel Image Optimizer – Optimize…
Robin Image Optimizer – Unlimited Image…
Download Trends
Over the past 30 days, ShortPixel Image Optimizer – Optimize… averaged approximately 6,617 daily downloads while Robin Image Optimizer – Unlimited Image… averaged 1,567.
Recent Reviews
ShortPixel Image Optimizer – Optimize… Reviews
Excellent plugin
Image compression is excellent. Easy to use & affordable. AI SEO for image fields is brilliant!!! Saved me many hours. No need for support (so far)… and that’s how you want it… ie. works out
great plugin!
works great and the support is great too!
Excelente Herramienta para wordpress
Una excelente herramienta totalmente recomendada This topic was modified 1 month ago by janofernandez.
Robin Image Optimizer – Unlimited Image… Reviews
Well done
It would be nice to add disabling scheduled launch. Manual only
Best Plugin
The best plugin for image optimization. But after the latest update, there’s a delay when converting Image Features to webp. Although it might just be my feeling. BTW, thanks.
Utter Waste Of Time
Your “fix” lasted for about three minutes. I have since then waited to give you time to migrate your servers. I have uninstalled and reinstalled the plugin several times. I have tried to get it to opt
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Frequently Asked Questions
Is ShortPixel Image Optimizer – Optimize… or Robin Image Optimizer – Unlimited Image… more popular?
Which has better ratings — ShortPixel Image Optimizer – Optimize… or Robin Image Optimizer – Unlimited Image…?
Are ShortPixel Image Optimizer – Optimize… and Robin Image Optimizer – Unlimited Image… free?
Which plugin has better support — ShortPixel Image Optimizer – Optimize… or Robin Image Optimizer – Unlimited Image…?
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Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.