Cloudinary provides seamless integration with Akamai and Amazon CloudFront as the CDN layer and includes modules that analyse the CDN flow, logs, etc. for remote resource refreshing, performing tuning and usage reporting. Therefore, it is preferred to have a CDN distribution layer owned and managed by Cloudinary.
However, you are able to use your own CDN layer. While we might deliver your assets from AWS, this does not require you to open an AWS account, or pay to AWS. We take care of the delivery end-to-end, and nothing in our APIs exposes you to the cloud-based platform we use at present. Note that you should verify that it technically works properly (custom CDN fetching data from our CDN layer).