I'm sorry to be harsh, but this is not an alternative to the linked product at all. It's not available through an API, there's no Javascript SDK, there's no CDN

I'm sorry to be harsh, but this is not an alternative to the linked product at all. It's not available through an API, there's no Javascript SDK, there's no CDN configured, you still have to set up and manage an S3 bucket... It's not even in the same category, imo.