Best Business Cloud Storage of 2026.
Business cloud storage isn't just consumer Dropbox with extra seats. It needs zero-knowledge encryption, real admin controls, audit logs and compliance certifications. Two providers stand out for 2026.
Who this guide is for
Small, mid-market and regulated businesses that want zero-knowledge cloud storage they can actually deploy.
Recently updated
Last editorial review · September 2026Since our last review cycle:
- •Tresorit— Review refreshed
Quick comparison
Filter the shortlist below by plan, audience or platform. Ratings, pricing and affiliate availability come straight from our master registry.
| Tool | Rating | Free plan | From | Best for | Affiliate | Actions | |
|---|---|---|---|---|---|---|---|
| Tresorit | 8.5* | No | From $11.99/user/mo | Regulated businesses needing zero-knowledge encrypted file collaboration with GDPR, HIPAA-suitable and ISO 27001 controls. | Yes | Read reviewVisit site → | |
| Proton Drive | 8.8* | Yes | Free / from $3.99/mo | People who want encrypted Dropbox/Drive alternative from a privacy-first company. | Yes | Read reviewVisit site → | |
| Dropbox | 8.4* | Yes | Free 2GB / from $9.99/mo | Cross-platform teams and creative professionals who move large files daily. | — | Read reviewVisit site → | |
| Microsoft OneDrive | 8.5* | Yes | Bundled with Microsoft 365; standalone plans available | Teams already standardised on Microsoft 365, Windows and SharePoint. | — | Read reviewVisit site → | |
| Google Drive | 8.7* | Yes | Free tier; storage and Workspace plans available | Teams whose documents are Google Docs, Sheets and Slides. | — | Read reviewVisit site → | |
| IDrive | 8.4* | Yes | Annual plans; free tier available | Households and small businesses that want unlimited-device backup rather than a sync-only drive. | — | Read reviewVisit site → |
Top recommendations
- 01TresoritSwiss end-to-end encrypted cloud storage for businesses.From $11.99/user/mo8.5*
- 02Proton DriveEnd-to-end encrypted cloud storage from the Proton suite.Free / from $3.99/mo8.8*
- 03DropboxThe most reliable cross-platform file sync we've used — priced above rivals, and worth it only if sync quality is your bottleneck.Free 2GB / from $9.99/mo8.4*
- 04Microsoft OneDriveThe storage layer of Microsoft 365 — hard to beat if your organisation already lives in Office.Bundled with Microsoft 365; standalone plans available8.5*
- 05Google DriveThe default collaborative drive for anyone already working in Google Workspace.Free tier; storage and Workspace plans available8.7*
- 06IDriveBackup-first cloud storage that covers whole machines rather than a single sync folder.Annual plans; free tier available8.4*
Best pick by use case
Value for money
Proton Drive for Business is dramatically cheaper and enough for most SMBs. Tresorit is the pick when compliance officers are in the room.
Final verdict
For regulated or enterprise teams — Tresorit. For SMBs and Proton-native teams — Proton Drive for Business.
Quick buying advice
The right pick depends on your budget, team size and platform. Here's the fastest path to a decision.
FAQ
Can we use Google Drive or OneDrive for regulated data?+
You can, but they are not zero-knowledge by default — the provider can access content. Tresorit and Proton Drive are zero-knowledge.
Which supports HIPAA workflows?+
Tresorit is the strongest fit; Proton offers a Business tier with a signed DPA under GDPR.
Related comparisons
Head-to-head deep dives on the tools featured in this guide.
Related reviews
End-to-end encrypted cloud storage from the Proton suite.
The most reliable cross-platform file sync we've used — priced above rivals, and worth it only if sync quality is your bottleneck.
The storage layer of Microsoft 365 — hard to beat if your organisation already lives in Office.
The default collaborative drive for anyone already working in Google Workspace.
Backup-first cloud storage that covers whole machines rather than a single sync folder.
Add thetoolmoneylab.com to your preferred sources in Google Search to see more of our independent software research in eligible Google experiences.
Editor's Notes
We start with our full database of 275+ reviewed tools, filter for the category, then apply hands-on testing weighted by ease of use, value for money, speed, accuracy and ROI. Only tools we would deploy for our own work make the shortlist.
Each tool is rated /10 across five criteria. The final rating is the weighted mean, with ROI and accuracy weighted higher for finance workflows. Scores are refreshed on every review cycle and are independent of any affiliate relationship.
Every tool is tested on a real book of business with live bank feeds, sample invoices, and a small vendor list. We reconcile a month of transactions end-to-end before scoring.
Some links on this page are affiliate links. We may earn a commission if you sign up. Rankings and scores are editorial and are never influenced by affiliate rates. See our affiliate disclosure.
September 2026 · Reviewed by The Tool Money Lab Editorial Team
November 2026
Updated quarterly. Editorial ratings are independent of any affiliate relationship.