EWWW Image Optimizer is described as 'A free image optimizing alternative to many of the other paid WordPress optimizers' and is an app in the Photos & Graphics category. There are more than 25 alternatives to EWWW Image Optimizer for a variety of platforms, including Online / Web-based, Mac, Windows, Wordpress and Linux. The best alternative is RIOT - Radical Image Optimization Tool, which is free. Other great apps like EWWW Image Optimizer are ImageOptim (Free Personal, Open Source), TinyPNG (Freemium), JPEGmini (Paid) and Optimage (Freemium).
WP Smush strips hidden, bulky information from your images, reducing the file size without losing quality. The faster your WordPress site loads, the more Google, Bing, Yahoo and other search engines will like it.
optimus.io offers lossless compression of images available with a WordPress plugin and via API. Benefits: - The file size will be reduced but the image quality remains the same - Bulk optimization - Conversion also to WebP available