What are some alternatives?
When comparing Imagify.co and Gravity Forms, you can also consider the following products
WP Smush - Reduce image file sizes, improve performance and boost your SEO using the free WPMU DEV WordPress...
ProntoForms - ProntoForms is a mobile business solutions application, converting paper forms onto any tablet or mobile device.
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
Forms On Fire - Forms On Fire provides a complete, customizable mobile forms and workflow system that is reliable and secure, works offline or online.
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.