Protection: Backups
| Criteria | Cubbit | Filen | Mega | ProtonDrive | Sync |
| Open Source? | No | Client | Client | No | No |
| Multifactor authentication offered? | No | Yes | Yes | Yes | Yes |
| Addtional notes | Peer-to-peer | Concerns raised about encryption implementation. | Research suggests sloppy code | Beta Android app, no iOS or desktop app | Audited |
| Free account signup link is hidden | No desktop or iOS app, Android app in beta |