S3Proxy cannot provide more that the S3 API allows, such as byte range updates, although some features can be enabled by bucket-level policies. S3Proxy can emu

S3Proxy cannot provide more that the S3 API allows, such as byte range updates, although some features can be enabled by bucket-level policies. S3Proxy can emulate features that other providers lack like public buckets and could provide other features like bucket-in-hostname. Apache jclouds provides the underlying object store compatibility so S3Proxy will benefit from improvements to it.