Proton Drive vs Sync.com
What owners say · Updated October 2026
Both options appeal to privacy-conscious buyers through zero-knowledge architectures, but Proton Drive offers a cleaner interface and extensive file versioning while Sync.com provides reliable background syncing for standard documents. Owners note that Proton Drive suffers from extremely slow synchronization with large numbers of small files, whereas Sync.com presents painfully slow initial sync times for massive libraries.
Proton
Proton Drive
“Proton Drive delivers unmatched privacy and robust file versioning, but its slow synchronization and immature ecosystem features leave demanding users frustrated.”
Choose it if you want extensive file versioning and a clean interface backed by end-to-end encryption.
From $4.99/mo, free plan availablePrices checked Oct 14, 2026
Sync.com
Sync.com
“Sync.com delivers rock-solid zero-knowledge privacy and file reliability, provided you can live with slower initial syncs and a dated mobile experience.”
Choose it if you need a reliable background sync for standard documents and a clutter-free web panel.
From $9/moPrices checked Oct 14, 2026
At a glance
| Proton Drive | Sync.com | |
|---|---|---|
| Starting price | $4.99/mo | $9/mo |
| Free plan | Yes | No |
| Speed and syncing complaints | 29% of reports | 35% of reports |
Share of each model's owner reports raising speed and syncing; the category average is 32%.
Where owners report a difference
| Proton Drive | Sync.com | |
|---|---|---|
| Privacy | Owners report end-to-end encryption covering all files, folder names, and filenames for maximum privacy. | Owners report strict zero-knowledge architecture and a strong privacy focus. |
| Synchronization | Owners report extremely slow synchronization speeds with large numbers of small files or deep folder structures. | Owners report painfully slow initial sync times for massive libraries and slower upload and download speeds compared to non-encrypted alternatives. |