GoGrid - Best of Cloud + Best of Hosting
ExaVault - ExaVault is your Secure Cloud FTP platform -- trusted by over 5,000 companies from Adobe to Zillow. Instant setup for manual and automated transfers with a full web interface and direct FTP, FTPS and SFTP support.
Amazon AWS - Amazon Web Services offers reliable, scalable, and inexpensive cloud computing services. Free to join, pay only for what you use.
SmartFile - Secure file sharing & FTP hosting for the enterprise.
Rackspace - More than 100,000 businesses trust Rackspace with their hosting and cloud computing. Get cloud, managed and hybrid hosting all backed by Fanatical Support.
FTP Today - FTP Today offers private and secure file transfer/sharing via a hosted Software-as-a-Service model.