I'm glad that you like the API. I'm working on a side-by-side comparison of RestBackup and other services. RestBackup receives the data from the customer via

I'm glad that you like the API. I'm working on a side-by-side comparison of RestBackup and other services. RestBackup receives the data from the customer via HTTPS and submits it to S3 also over HTTPS. So the data is encrypted in-transit but remains in S3 as-is. This is the minimum viable product. I'm considering encrypted storage as a feature for the public Beta. RestBackup has per-request charges for the same reason that S3 and CloudFiles have them: to avoid losing money on high-volume request loads on small files. If you need to store many small files, it might be more efficient to package them up in a tar archive. Thanks for the great comment and the tweet! I hope to see you in the alpha-test!