PluginSift

Autoptimize vs Slimbox Plugin (2026)

Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.

Autoptimize

Autoptimize

4.7(1,424)

900K+ active installs

Free

Updated Yesterday
View Autoptimize
VS
Slimbox Plugin

Slimbox Plugin

5(1)

600 active installs

Free

Updated 17 years ago
View Slimbox Plugin

Quick Verdict

As of April 2026, Slimbox Plugin has a higher user rating (5/5 from 1 reviews) while Autoptimize leads in active installations (900K+ vs 600). Both are free WordPress plugins. Autoptimize has accumulated 43M+ total downloads while Slimbox Plugin has 75K+.

Detailed Comparison

Rating
4.7/5Autoptimize
►
Slimbox Plugin5/5
Total Reviews
1,424Autoptimize
◄
Slimbox Plugin1
Active Installs
900K+Autoptimize
◄
Slimbox Plugin600
Total Downloads
43M+Autoptimize
◄
Slimbox Plugin75K+
Support Resolution
36%Autoptimize
Slimbox PluginN/A
Last Updated
YesterdayAutoptimize
◄
Slimbox Plugin17 years ago
First Released
2009Autoptimize
Slimbox Plugin2007
Age
17 yearsAutoptimize
Slimbox Plugin19 years
WP Requires
5.3+Autoptimize
Slimbox Plugin1.5+
PHP Requires
7.1+Autoptimize
Slimbox Pluginfalse+
Business Model
FreeAutoptimize
Slimbox PluginFree
Latest Version
3.1.15.1Autoptimize
Slimbox Plugin1.3

Rating Breakdown

Autoptimize

4.7/5(1,424 reviews)
5
90%
4
2%
3
1%
2
1%
1
5%

Slimbox Plugin

5/5(1 reviews)
5
100%
4
0%
3
0%
2
0%
1
0%

Recent Reviews

Autoptimize Reviews

by uniqf0x

avoid

causes critical error, also no way to deactivate or remove without it crippling my wp site. don’t use it.

by kkrajk

Injects Malware.

Not one but this happened twice in about 6 months across 2 sites. This topic was modified 1 week, 6 days ago by kkrajk.

by davo342

Mala idea adquirir la versión PRO

Pague la versión PRO, y realmente fue un desastre, mi web tuvo constantes caídas, excesiva cantidad de cache, problemas con el CSS, realmente fue una perdida de dinero en el Plugin

Slimbox Plugin Reviews

No reviews yet

Frequently Asked Questions

Is Autoptimize or Slimbox Plugin more popular?
Autoptimize has 900K+ active installations while Slimbox Plugin has 600. Autoptimize is the more widely-used plugin as of April 2026.
Which has better ratings — Autoptimize or Slimbox Plugin?
Autoptimize has a 4.7/5 rating from 1,424 reviews, while Slimbox Plugin has a 5/5 rating from 1 reviews.
Are Autoptimize and Slimbox Plugin free?
Autoptimize is free and Slimbox Plugin is free. Both can be downloaded from the WordPress.org plugin directory.
Which plugin has better support — Autoptimize or Slimbox Plugin?
Support resolution data is not available for all plugins. Check each plugin's WordPress.org support forum for current response quality.
Which plugin is updated more frequently?
Autoptimize was last updated Yesterday and Slimbox Plugin was last updated 17 years ago.

Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.