BoxCryptor - Boxcryptor encrypts your sensitive files before uploading them to cloud storage services like Dropbox, Google Drive, Microsoft OneDrive, Box, and many others.
Bitglass - Bitglass is a cloud security gateway that helps enterprises move to SaaS-based and mobile deployments securely.
Mega - Secure File Storage and collaboration
Compaas - Compaas is the only tool built for SMB's to protect against employee negligence.
Cryptomator - When it comes to saving your files on a cloud server, it is important to ensure the security of those files. Keeping your delicate files out of the wrong hands can save you a lot of time and hassle. Read more about Cryptomator.
Netskope - Netskope is a cloud based security solution.