What are some alternatives?
When comparing Ameto.de and imgix, you can also consider the following products
Imagify.co - Resize, Crop and Manipulate your images on the fly!
Cloudinary - Cloudinary is a cloud-based service for hosting videos and images designed specifically with the needs of web and mobile developers in mind.
Kraken - Kraken is a robust, ultra-fast image optimizer. Thanks to its vast array of optimization algorithms Kraken is a world ahead of other tools. Want to save bandwidth and improve your website's load times? Look no further and welcome to Kraken!
Sirv - Dynamic image processing, hosting and rich-media for retailers and eCommerce.
ImageKit.io - Instant multi-platform image optimization
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.