Sync.com vs Proton Drive
A detailed comparison to help you choose between Sync.com and Proton Drive.
Sync.com Zero-knowledge encrypted cloud storage. | Proton Drive Encrypted cloud storage from Proton. | |
|---|---|---|
| Rating | 4.4 (419 reviews) | 4.3 (340 reviews) |
| Pricing Model | paid | freemium |
| Starting Price | From $8/mo | From $0/mo |
| Best For | Best for users needing secure cloud storage for sensitive files | Best for users needing secure cloud storage for sensitive files |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | — | — |
Sync.com
Pros
- + Client-side encryption positioned as default
- + Privacy Center documents feature trade-offs
- + 2FA and device lockout controls available
- + Desktop app supports resume for large transfers
- + File-level deduplication reduces re-uploads
- + SOC 3 report documents security controls
Cons
- - Hard limit: 5 active devices per account
- - Recovery options can reduce strict zero-knowledge
- - Web uploads can degrade on large files
- - No block-level sync optimization for big edits
- - No public cryptographic audit found
Proton Drive
Pros
- + End-to-end encryption, Proton can’t decrypt file contents
- + Filenames, folders, and thumbnails are end-to-end encrypted
- + Open-source client apps and SDK components
- + Drive Plus includes 10-year file version history
- + Free tier available for basic storage
Cons
- - Some operational metadata remains visible to Proton
- - Drive-specific audits appear older and limited in scope
- - Usability gaps versus mainstream cloud storage in reviews
- - Client-side encryption can add performance overhead
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