Akku is a powerful, flexible enterprise cloud security solution created to enable enterprises manage identity and access across their cloud environment.
With a range of versatile features, Akku is an Identity and Access Management (IAM) solution that helps improve data security, privacy, standards compliance and productivity.
For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Duo Security - Duo Security provides cloud-based two-factor authentication. Duo’s technology can be deployed to protect users, data, and applications from breaches, credential theft, and account takeover.
Dropbox - Online Sync and File Sharing
Tresorit - Encrypted cloud storage for your confidential files. Using Tresorit, files are encrypted before being uploaded to the cloud. Start encrypting files for free.
Google Drive - Access and sync your files anywhere
Barracuda Email Protection - Barracuda Essentials offers advanced Office 365 security features including email scanning, archiving, backup & recovery, and real-time phishing defense.
Mega - Secure File Storage and collaboration