PluginSift

Kraken.io Image Optimizer vs Zara 4 Image Compression (2026)

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

Kraken.io Image Optimizer

Kraken.io Image Optimizer

4.5(119)

10K+ active installs

Free

Updated 1 month ago
View Kraken.io Image Optimizer
VS
Zara 4 Image Compression

Zara 4 Image Compression

4.1(7)

100 active installs

Free

Updated 7 years ago
View Zara 4 Image Compression

Quick Verdict

As of April 2026, Kraken.io Image Optimizer has a higher user rating (4.5/5 from 119 reviews) and leads in active installations (10K+ vs 100). Both are free WordPress plugins. Kraken.io Image Optimizer has accumulated 399K+ total downloads while Zara 4 Image Compression has 24K+.

Detailed Comparison

Rating
4.5/5Kraken.io Image Optimizer
◄
Zara 4 Image Compression4.1/5
Total Reviews
119Kraken.io Image Optimizer
◄
Zara 4 Image Compression7
Active Installs
10K+Kraken.io Image Optimizer
◄
Zara 4 Image Compression100
Total Downloads
399K+Kraken.io Image Optimizer
◄
Zara 4 Image Compression24K+
Support Resolution
N/AKraken.io Image Optimizer
Zara 4 Image CompressionN/A
Last Updated
1 month agoKraken.io Image Optimizer
◄
Zara 4 Image Compression7 years ago
First Released
2014Kraken.io Image Optimizer
Zara 4 Image Compression2016
Age
12 yearsKraken.io Image Optimizer
Zara 4 Image Compression10 years
WP Requires
4.9+Kraken.io Image Optimizer
Zara 4 Image Compression3.0.1+
PHP Requires
5.6+Kraken.io Image Optimizer
Zara 4 Image Compressionfalse+
Business Model
FreeKraken.io Image Optimizer
Zara 4 Image CompressionFree
Latest Version
2.7.0Kraken.io Image Optimizer
Zara 4 Image Compression1.2.17.2

Rating Breakdown

Kraken.io Image Optimizer

4.5/5(119 reviews)
5
84%
4
5%
3
1%
2
2%
1
8%

Zara 4 Image Compression

4.1/5(7 reviews)
5
71%
4
0%
3
14%
2
0%
1
14%

Recent Reviews

Kraken.io Image Optimizer Reviews

by blieben

Poor Quality

Not worth the time.

by David Artiss

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

by yoavshai

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.

Zara 4 Image Compression Reviews

No reviews yet

Frequently Asked Questions

Is Kraken.io Image Optimizer or Zara 4 Image Compression more popular?
Kraken.io Image Optimizer has 10K+ active installations while Zara 4 Image Compression has 100. Kraken.io Image Optimizer is the more widely-used plugin as of April 2026.
Which has better ratings — Kraken.io Image Optimizer or Zara 4 Image Compression?
Kraken.io Image Optimizer has a 4.5/5 rating from 119 reviews, while Zara 4 Image Compression has a 4.1/5 rating from 7 reviews.
Are Kraken.io Image Optimizer and Zara 4 Image Compression free?
Kraken.io Image Optimizer is free and Zara 4 Image Compression is free. Both can be downloaded from the WordPress.org plugin directory.
Which plugin has better support — Kraken.io Image Optimizer or Zara 4 Image Compression?
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?
Kraken.io Image Optimizer was last updated 1 month ago and Zara 4 Image Compression was last updated 7 years ago.

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