| Price from | $8.25/mo | $0.99/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Plans published | 3 | 20 |
| Spec score · Cloud Storage Services | 9.0 (#13) | 9.4 (#1) |
| Spec score · Cloud storage | 8.3 (#37) | 8.7 (#22) |
| Device platforms | Windows,macOS,iOS,Android | Windows,macOS,Linux,iOS,Android |
| Free plan | No | Yes |
| Security | 4Sync's privacy policy says it takes reasonable measures to protect personal data, while noting no security measure is perfect or impenetrable. | Blomp states that stored content and sensitive data in transit are encrypted and that accounts can use two-factor authentication. |
| Storage limit | 1000 | 500 |
| Support | 4Sync provides a Help page with instructions for account verification, password recovery, uploading, downloading, and sharing files. | Blomp provides a support forum, support email and help links from its website. |