Who’s the real “Dropbox of the enterprise”?.

Dropbox relies on Amazon’s Simple Storage Service (S3) for data storage, which spreads files across multiple data centers throughout the United States. While Dropbox encrypts these files, the encryption process occurs only *after* they have been uploaded. For some companies, this approach may not be good enough, which is why enterprise and business competitors such as Accellion have made a point of offering “seamless client-side encryption of files before they are sent.” SpiderOak, which Ars examined earlier this month, is another example of a Dropbox competitor with client-side encryption.