What are some alternatives?
When comparing Ameto.de and Imagify, you can also consider the following products
Imagify.co - Resize, Crop and Manipulate your images on the fly!
imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
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!
Piio - Generates responsive images so you don't have to optimize
Cloudinary - Cloudinary is a cloud-based service for hosting videos and images designed specifically with the needs of web and mobile developers in mind.
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.