Methods and systems for vendor independent and secure cloud storage distribution and aggregation are provided. According to one embodiment, an application programming interface (API) is provided by a cloud storage gateway device logically interposed between third-party cloud storage platforms and users of an enterprise. The API facilitates storing of files, issuing of search requests against the files and retrieval of content of the files. A file storage policy is assigned to each user, which defines access rights, storage diversity requirements and a type of encryption to be applied to files. Responsive to receiving a request to store a file, (i) searchable encrypted data is created relating to content and/or metadata of the file based on the assigned file storage policy; and (ii) the searchable encrypted data is distributed among the third-party cloud storage platforms based on the storage diversity requirements defined by the assigned file storage policy.