All in One SEO – Powerful SEO Plugin to… vs Speed Up – Optimize CSS Delivery (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
All in One SEO – Powerful SEO Plugin to…
3.0M+ active installs
Free
Speed Up – Optimize CSS Delivery
1.0K+ active installs
Free
Quick Verdict
As of April 2026, Speed Up – Optimize CSS Delivery has a higher user rating (5/5 from 8 reviews) while All in One SEO – Powerful SEO Plugin to… leads in active installations (3.0M+ vs 1.0K+). Both are free WordPress plugins. All in One SEO – Powerful SEO Plugin to… has accumulated 200M+ total downloads while Speed Up – Optimize CSS Delivery has 59K+.
Detailed Comparison
| Metric | All in One SEO – Powerful SEO Plugin to… | Speed Up – Optimize CSS Delivery | |
|---|---|---|---|
| Rating | 4.7/5 | ► | 5/5 |
| Total Reviews | 5,075 | ◄ | 8 |
| Active Installs | 3.0M+ | ◄ | 1.0K+ |
| Total Downloads | 200M+ | ◄ | 59K+ |
| Support Resolution | 100% | N/A | |
| Last Updated | 3 weeks ago | ◄ | 3 years ago |
| First Released | 2007 | 2016 | |
| Age | 19 years | 10 years | |
| WP Requires | 5.7+ | 3.5+ | |
| PHP Requires | 7.2+ | false+ | |
| Business Model | Free | Free | |
| Latest Version | 4.9.5.1 | 1.0.11 |
Rating Breakdown
All in One SEO – Powerful SEO Plugin to…
Speed Up – Optimize CSS Delivery
Download Trends
Over the past 30 days, All in One SEO – Powerful SEO Plugin to… averaged approximately 72,215 daily downloads while Speed Up – Optimize CSS Delivery averaged 5.
Recent Reviews
All in One SEO – Powerful SEO Plugin to… Reviews
Useful but Limited
All in One SEO did help me with basic SEO work, so tnkz for that. But some parts felt less smooth than I expected, and I still had to fix things on my own. 3 star.
Een prettige SEO plugin om mee te werken
Een zeer prettige SEO plugin om mee te werken. Laat direct zien wat je kunt verbeteren en geeft ook een score. Ook de koppeling met AI voor het genereren van een meta beschrijving is erg prettig. Al m
Une aide appréciable
Je commence juste à l’utiliser mais cette extension est déjà d’une grande aide. Je me demande juste si elle est toujours bien à jour avec les cahiers des charges SEO/GEO. On verra bien au fur et à mes
Speed Up – Optimize CSS Delivery Reviews
5 estrelas. Funciona muito bem.
Muito bom.
This plug-in is a blessing
This plug-in is a blessing This plug-in is the best! We have to give a big prize to the person who created this plug-in. Thank you very much.
Works great!
Does what it says on the tin, which Google pagespeed likes a lot.
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Frequently Asked Questions
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Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.