Ubuntu One users can migrate to Open Source ownCloud
ownCloud is an open source project, so you can study the code, just like any other free software project whether it be WordPress or Drupal. You can install ownCloud on your own server, you can choose a provider which is outside the USA and is not very NSA friendly. You own your very cloud just the way you own any site that you run. If you don’t want to deal with running your own server then you can choose ownCloud recommend providers and get it as SaaS.