It is free and unlimited to the extent that your bandwidth is free and unlimited. Cubby is basically just a program that transfers files from one computer to a

It is free and unlimited to the extent that your bandwidth is free and unlimited. Cubby is basically just a program that transfers files from one computer to another; it doesn't need to use the Cubby servers for that. 5gb of online cloud storage is also provided, but additional storage beyond that is not free or unlimited.