Proton Drive vs Sync.com 2026: Swiss Encryption vs Canadian Zero-Knowledge

Quick Verdict

Sync.com wins for most privacy-focused users: faster upload speeds, cheaper pricing, more generous free tier, and a longer operational track record. Proton Drive wins for users who want the full Proton ecosystem (ProtonMail, ProtonVPN, Proton Pass) in a single subscription, or who specifically value Swiss jurisdiction over Canadian.

What They Have in Common

Both Proton Drive and Sync.com offer genuine zero-knowledge encryption — files are encrypted on your device before upload, using keys neither company can access. Both use AES-256. Both have been independently reviewed for their security architecture. Neither is US-based, providing some separation from US legal pressure on file content. Both are legitimate choices for users whose primary concern is provider access to their files.

The differences are in speed, price, ecosystem, jurisdiction, and track record.

Pricing

Sync.com:

• Free: 5GB
• Solo Basic: $8/month for 2TB (monthly or annual)
• No lifetime plans

Proton Drive:

• Free: 1GB (shared across Proton account)
• Drive Plus: $3.99/month for 200GB (annual billing)
• Proton Unlimited: $7.99/month for 500GB + ProtonMail, ProtonVPN, Proton Pass

At equivalent storage, Sync.com is cheaper: $8/month for 2TB vs Proton's $9.99/month for 2TB equivalent. However, the Proton Unlimited bundle changes the math significantly. If you would otherwise pay separately for a VPN (~$4-8/month), email (~$3-5/month for a privacy-focused option), and password manager (~$2-4/month), the Proton Unlimited bundle at $7.99/month for all four services is exceptional value.

Sync.com wins on price for standalone storage. Proton Unlimited wins if you use the full ecosystem.

Speed

This is the most significant practical difference.

Sync.com upload speeds in our testing: 40-90 Mbps on a 400 Mbps connection. Consistent, reliable, occasionally hitting the higher end on large files.

Proton Drive upload speeds: 30-50 Mbps on the same connection. Slower, consistently.

Both use client-side AES-256 encryption — the overhead is similar. The speed difference comes from infrastructure. Proton Drive's speed has been a consistent finding across third-party reviews.

Downloads: Sync.com averages 120-160 Mbps. Proton Drive averages 80-120 Mbps. Both are acceptable; Sync.com is consistently faster.

Sync.com wins on speed, meaningfully.

Free Tier

Sync.com gives 5GB free, permanently. Proton Drive gives 1GB free (shared across the Proton account — if you also use ProtonMail, the 1GB is shared).

For evaluating the service, Sync.com's 5GB free tier gives you enough to meaningfully test file sync with real documents. Proton Drive's 1GB is barely enough to upload a few photos and confirm the app opens.

Sync.com wins on free tier.

Jurisdiction

Sync.com is headquartered in Toronto, Canada. Canada is a Five Eyes intelligence alliance member. US and other Five Eyes governments can request information through intelligence-sharing agreements. In practice, for zero-knowledge storage, the jurisdiction matters primarily for metadata — account activity, IP addresses, who you share with. File contents are protected regardless, because Sync.com doesn't have the keys.

Proton Drive is headquartered in Geneva, Switzerland. Switzerland is not an EU member, not a Five Eyes member, and has strong privacy laws (FADP). Swiss legal process for government data requests is slower and more restricted than MLAT requests through Five Eyes channels.

For most users, the jurisdiction difference is academic — both provide strong metadata protection and neither can hand over file contents. For high-risk users (journalists, activists, legal professionals in contested matters), the Swiss jurisdiction provides marginally better metadata protection.

Proton Drive wins on jurisdiction quality. For most users, the practical difference is minimal.

Platform Support

Sync.com: Windows, Mac, iOS, Android, web. Linux sync is not officially supported on the free plan; paid plans include the Linux client.

Proton Drive: Windows, Mac, Linux, iOS, Android, web. Full Linux support with a first-party client.

Proton Drive wins on Linux support.

Track Record and Trust

Sync.com was founded in 2011 — 14 years of operation and a significant installed base of privacy-conscious users. No major security incidents or controversy.

Proton was founded in 2013 (ProtonMail) with Drive launching in earnest in 2021-2022. The 2021 IP logging case (French authorities obtained an activist's IP through Swiss courts) clarified that metadata protection has limits even in Switzerland. Proton's transparency about the case and the technical limitations is a positive signal, even if the underlying incident was a reminder of limitations.

Sync.com has a longer operational track record for cloud storage specifically.

Who Should Use Proton Drive

• Existing Proton users (ProtonMail, ProtonVPN) for whom adding Drive at the Proton Unlimited tier is near-free
• Linux users who want a first-party zero-knowledge sync client
• Users who specifically want Swiss jurisdiction for the strongest metadata protections
• Users who want a single privacy-focused vendor for email, VPN, passwords, and storage

Who Should Use Sync.com

• Users who want zero-knowledge storage at the best price without an ecosystem commitment
• Users who need faster upload speeds for large file syncing
• Anyone who wants a larger free tier to evaluate before committing
• Users who need HIPAA compliance with a BAA at a reasonable price

Get Proton Drive — From $3.99/Month Get Sync.com — 5GB Free

Full Proton Drive review → | Full Sync.com review →