Best Encrypted Cloud Storage for Business in 2026
Proton Drive wins as the best encrypted cloud storage for business in 2026: end-to-end encryption at $9.99 per user. Sync.com value, Tresorit runner-up.
Rankings reflect documented features, public pricing as of the "Last Updated" date, and category positioning analysis. We apply a Commercial Gate: only tools we can earn a commission from (now or in the next 12 months) enter the ranking pool. When a non-monetizable tool is the right answer, we name it with a caveat. How rankings work · Editorial policy
Proton Drive for Business
Google Drive, Dropbox and OneDrive encrypt files, but they hold the keys, which is how they index contents for search, render previews on their servers, and answer a legal request with readable files. Encrypted cloud storage in the sense this guide means is end-to-end: the file is encrypted on the device and the provider never holds a key that opens it. Proton Drive wins on that brief in 2026 because Drive Professional at $9.99 per user gives a business 1TB per seat, encrypted filenames as well as contents, and Swiss jurisdiction, with the cleanest apps in the category. Sync.com is the value pick at $6 per user with the same zero-knowledge model and fewer refinements. Tresorit is the runner-up for regulated firms that need the audit and compliance paperwork and will pay for it. Google Drive is included because for most businesses it is the honest answer: the threat is a lost laptop, not the provider, and the collaboration tools are worth more than the guarantee.
Try Proton Drive for BusinessAt a Glance
| Feature | Proton Drive for Business | Sync.com | Tresorit | Google Drive (Workspace) |
|---|---|---|---|---|
| Price | Drive Professional $9.99/user/mo, 1TB per user | Teams Standard $6/user/mo, 1TB per user | From about $14.50/user/mo, 3-seat minimum | Workspace Business Starter $7/user/mo, 30GB |
| Starting Price | - | - | - | - |
| Encryption | - | - | - | - |
| Free Tier | - | - | - | - |
| Best For | - | - | - | - |
Quick Comparison
Our Top Picks
Proton Drive for Business
End-to-end encrypted files and filenames under Swiss law, with the best apps of the zero-knowledge options.
- Encrypts filenames and folder structure, not just contents
- 1TB per user on the Professional tier
- Shares an admin console with Proton Mail, Pass and VPN
- Best desktop and mobile apps of the zero-knowledge options
- No content search or real-time co-editing
- Previews limited to common file types
- Pricier than Sync.com for the same encryption model
Sync.com
The cheapest zero-knowledge business storage, with a decade of doing only this.
- Lowest price for zero-knowledge business storage
- Complete sharing controls: passwords, expiry, download limits
- Long single-purpose track record
- Plain desktop client, slower sync on large folder trees
- Mobile apps and admin tools behind Proton
- No wider ecosystem of business tools
Tresorit
The compliance-grade option. Certifications, audit logs and data residency, at the highest price here.
- Certifications and audit logs for regulated buyers
- Data residency choice across regions
- Per-group admin policies for devices and sharing
- Highest price here, with a three-seat minimum
- Apps no better than Proton at the price
- More than an unregulated small business needs
Google Drive (Workspace)
Not zero-knowledge, and the honest answer for most businesses anyway.
- Real-time co-editing and search inside every document
- The collaboration tooling most teams actually run on
- Cheapest entry price in this comparison
- Google holds the encryption keys
- Files are readable under a legal order
- Client-side encryption only on Enterprise tiers
How This Was Tested
Pricing reflects published business-tier list prices billed annually as of September 2026. Encrypted means end-to-end with keys held only by the customer; providers that encrypt at rest with their own keys are noted as such. Rankings weigh the encryption model first, then price per user, apps, sharing controls and admin tooling. Google Drive is included as the baseline most businesses are comparing against.
Frequently Asked Questions
Proton Drive, because Drive Professional at $9.99 per user gives a business end-to-end encrypted files and filenames, 1TB per seat and the best apps of the zero-knowledge providers. Sync.com offers the same encryption model for $6 per user with fewer refinements, and Tresorit adds the compliance certifications regulated firms need at a higher price.
Yes, in transit and at rest, but Google holds the keys. That is what allows search inside documents, previews and co-editing, and it also means Google can read the files and must produce them readable under a valid legal order. End-to-end providers like Proton Drive, Sync.com and Tresorit encrypt on the device with keys Google-style providers never see.
Most do not. The realistic threats are a lost device or a phished login, and Google, Dropbox and Microsoft handle those well. The businesses that do need it hold client-confidential material, such as legal, accounting, health or HR files, or have customers who ask where their data lives and who can read it. For them the answer is a policy question, not a technical one.
Server-side search inside file contents, previews for less common file types, and real-time co-editing of the Google Docs kind, because all of those require the provider to read the file. Sync is also slower on very large folder trees since encryption happens on the device. Sharing, versioning and mobile access all work normally.
Between $6 and $15 per user a month for business tiers in 2026. Sync.com sits at the bottom at $6 with 1TB per seat, Proton Drive at $9.99 with 1TB, and Tresorit at roughly $14.50 with certifications and audit logs. That compares with Google Workspace from $7 and Dropbox Business from about $15, so the encryption premium is smaller than most buyers expect.
For privacy, yes: Proton never holds a key to the files and Dropbox does. For collaboration and sync speed on large media libraries, Dropbox is still ahead, and its integrations reach further. A business choosing between them is choosing which of those two properties it values more, and the answer is usually clear once the question is put that way.