Best Site for Encrypted Cloud Storage
Summary
The best encrypted cloud storage is Proton Drive if you want a credible mainstream brand with end-to-end encryption and an integrated suite. Tresorit is the long-running enterprise-grade pick, now owned by Swisscom. Internxt is the newer open-source-client option that listicles tend to miss. Sync.com is the Canadian alternative with no-knowledge architecture. MEGA gets recommended frequently but its history of ownership changes and the lingering association with Kim Dotcom's earlier Megaupload makes its trust story complicated. Most listicles default to MEGA because it's free; we weight architecture and audit history.
Top 5 at a glance
| # | Site | Best for | Price |
|---|---|---|---|
| 1 | Proton Drive | End-to-end encrypted storage integrated with Proton Mail | Free tier; paid plans from a low monthly fee |
| 2 | Tresorit | Enterprise-grade encrypted storage with strong sharing | Premium pricing aimed at businesses and prosumers |
| 3 | Internxt | Open-source-client encrypted storage at reasonable pricing | Free tier; paid plans competitive with mainstream |
| 4 | Sync.com | Canadian no-knowledge encrypted storage | Free tier; paid plans from a low monthly fee |
| 5 | MEGA | Generous free tier with end-to-end encryption | Free tier of 20GB; paid plans for more |
Detailed rankings
Proton Drive
End-to-end encrypted storage integrated with Proton Mail
The default when you want encrypted cloud storage from a brand that has built its reputation on privacy.
Pros
- End-to-end encryption by design
- Open-source clients
- Same Proton ecosystem as Mail, Calendar, VPN, Pass
- Swiss jurisdiction
Cons
- Apps less polished than Dropbox or Google Drive
- Collaboration with non-Proton users requires shared-link flows
- Free tier limited storage
Price: Free tier; paid plans from a low monthly fee
Sources: proton.me
Tresorit
Enterprise-grade encrypted storage with strong sharing
The right pick for businesses and users who want enterprise-grade encrypted storage with strong sharing controls.
Pros
- Long history in encrypted cloud storage
- Strong sharing controls including watermarks and expiry
- Audit history with multiple third-party reviews
- Swiss data hosting
Cons
- Acquired by Swisscom in 2021 — direction is tied to a telco's strategic priorities
- Premium pricing — not for casual personal users
- Less polished consumer experience than Proton Drive
Price: Premium pricing aimed at businesses and prosumers
Sources: tresorit.com
Internxt
Open-source-client encrypted storage at reasonable pricing
The right pick when you want open-source clients and don't want to be tied to Proton's broader ecosystem.
Pros
- Open-source desktop and mobile clients
- End-to-end encryption
- EU-based with GDPR alignment
- Free tier covers light personal use
Cons
- Newer than Proton or Tresorit
- Smaller user community
- Polish behind the leaders in spots
Price: Free tier; paid plans competitive with mainstream
Sources: internxt.com
Sync.com
Canadian no-knowledge encrypted storage
The right Canadian alternative when you specifically want non-EU non-US data hosting.
Pros
- Canadian operator with strong privacy law backing
- No-knowledge architecture — Sync cannot decrypt your files
- Reasonable free tier
- Strong sharing and collaboration features
Cons
- Less polished than Proton Drive or Dropbox
- Web preview limited by encryption design
- Mobile apps trail desktop in features
Price: Free tier; paid plans from a low monthly fee
Sources: www.sync.com
MEGA
Generous free tier with end-to-end encryption
Functional but trust depends on which version of MEGA's evolving design and ownership story you weight. Read recent security analyses before relying on it for sensitive content.
Pros
- End-to-end encryption claimed by default
- Generous free storage tier
- Cross-platform clients
Cons
- Founded by Kim Dotcom — ownership has changed multiple times and the brand carries complex history
- Security researchers have published critiques of MEGA's encryption design over the years — read current state before storing sensitive content
- Free tier comes with bandwidth limits that affect heavy use
Price: Free tier of 20GB; paid plans for more
Sources: mega.io
How we chose
- End-to-end encryption with the provider unable to decrypt by design.
- Open-source clients for verification of the encryption claims.
- Operator credibility and audit history.
- Free tier usefulness for evaluation.
- Cross-platform support including mobile.
- Sharing and collaboration with non-users handled cleanly.
Frequently asked questions
What is end-to-end encryption in cloud storage?
Files are encrypted on your device before upload, with keys you control. The cloud provider stores encrypted blobs they cannot decrypt. Dropbox and Google Drive encrypt in transit and at rest but the provider holds the keys — they can decrypt if compelled or compromised. E2E removes that capability.
Why isn't Dropbox or Google Drive in the top?
Neither offers end-to-end encryption by default. Both encrypt in transit and at rest, but the provider holds decryption keys. For the specific question of 'encrypted cloud storage' where you want the provider unable to read your files, the picks above are structurally different.
Can I use Cryptomator with Dropbox?
Yes. Cryptomator and similar tools create encrypted vaults inside any cloud-storage provider. This gives you E2E protection on top of Dropbox or Google Drive. It works well but adds friction to sharing and mobile use.
What about iCloud's Advanced Data Protection?
Apple's Advanced Data Protection adds end-to-end encryption to most iCloud categories for users who opt in. It is a credible option for Apple ecosystem users. The opt-in requirement and Apple-only nature limit it as a general recommendation.
Is encrypted storage enough for sensitive data?
Encryption protects content at rest and in transit. For genuinely sensitive content, also consider where the provider operates legally, how you authenticate, and whether device-level threats — malware on your laptop — would expose decrypted content. Storage encryption is part of a layered approach.