The judging score would be based on the type of image optimization features and the total amount of reduction from each optimization option.
For the record, WP Maven is using Imagify to serve images using WebP format and it syncs well with WP Rocket. Click here to learn more about WP Rocket configuration.
Want to know which is the clear winner? You'll be surprised!
Carry on reading to learn more.
An image optimize plugin helps you to reduce the size of the image by optimizing it.
An optimized image will load faster due to smaller in overall file size. This helps to speed up your website loading speed and your website visitors are going to see a faster WordPress load.
WordPress is home to hundreds of image optimizers and it is rather hard to determine which is the best. Two of our personal favorite WordPress image optimizer plugins are ShortPixel and Imagify.
At this point of writing, both of these plugins offer free and paid plans. Here's more details about them.
ShortPixel. The free plan comes with 100 image optimizations with no size limit per month. Paid plans start at $4.99 per month with 5,000 images optimizations per month and offer both image optimization using a plugin or online.
Imagify. The free plan comes with 200mb worth of image optimizations per month. Paid plans start at $4.99 per month for 1 GB worth of images optimizations (approximately 10,000 image optimization) per month and offer both image optimization using a plugin or online.
Which plugin offers the best image image optimization for WordPress? Let's see the results!
A sample image was downloaded from Unsplash with a size of 1.56mb. Unoptimized image link. For the record, the image compression tests were done outside of WordPress to avoid automatic image compression (via ShortPixel and Imagify online optimization on the web).
ShortPixel comes with 3 methods of image compression namely Lossy Compression, Glossy Compression and Lossless Compression.
Imagify comes with 3 methods of image compression namely Ultra, Aggressive and Normal.
In order for us to compare them properly, let's take a look at the table below.
|Image Optimization Plugin||1st tier||2nd tier||3rd tier|
|ShortPixel||328kb (-78.97%)||464kb (-70.25%)||No reduction|
|Imagify||328kb (-78.97%)||701kb (-55.06%)||No reduction|
Both ShortPixel Lossy and Imagify Ultra perform well, scoring 78.97% in image reduction equally as the first tier (highest compression ratio).
ShortPixel Glossy performs better than Imagify Aggressive in the second tier with ShortPixel scoring 15% more reduction compared to Imagify.
From our tests, both ShortPixel and Imagify are very similar in results when it comes to lossy image compression. However, ShortPixel excels better than Imagify in the glossy category.
Both of these image optimizer plugins are pretty shoulder to shoulder when it comes to maximum image compression.
Pricing comparison. In pricing, Imagify beats ShortPixel hands down as it is cheaper and more affordable. Plus, you can get a 30% discount for all Imagify plans by using this promotion code "WPR30".
Features comparison. In features, ShortPixel beats Imagify as it comes with ShortPixel CDN integrated into all plans (including the free tier). If you are not using any image CDN services, ShortPixel might just be the right image optimizer plugin for your WordPress site.
As a recap, both of these image optimizer plugins for WordPress are very decent with different features. As we are using Kinsta hosting, we are using the inbuilt cache feature and therefore, we use Imagify. If we are using web hosting services without CDN, we would definitely opt for ShortPixel as it offers image CDN in the package.