Whether you need large object storage for applications or you’re building a service offering, Riak’s Riak CS provides a cost-effective solution that’s highly available, scalable and simple to use for storing all your images, text, video, documents, database backups and software binaries.
Optimized for public, private or hybrid clouds, Riak CS is Amazon S3- and OpenStack Swift-compatible, has robust APIs, and scales easily to handle petabytes of data using commodity software that provides near-linear performance increases as capacity is added.

This section will be expanded on a lot in the coming weeks.

In the meantime, please feel free to check out Riak KV on the old Basho site.