What are some alternatives?
When comparing Imagify.co and WP Smush, you can also consider the following products
Gravity Forms - Gravity Forms is one of the best and easiest contact form plugins to create modern forms for websites powered by widely-used WordPress.
ImageOptim - Faster web pages and apps.
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
Bitfinex - Bitfinex is the largest and most advanced crypto-currencies trading platform.
Yoast Plugins - Yoast offers plugins to improve SEO and optimize web sites and blogs.
tiny.pictures - Real-time image-processing, optimization, and Content Delivery Network