As of 1 Nov 2026, the panel rates Proton Drive 3/5 and Tresorit 3.5/5 in Cloud Storage & File Sharing. Weighted by what each judge cares about, 0 of the 6 judges pick Proton Drive and 5 pick Tresorit, 1 calls it a tie. Proton Drive scores higher on 3 of 7 criteria (European sovereignty, Encryption, key custody & recovery and Sync, clients & file access). Tresorit scores higher on 3 of 7 criteria (Sharing & external collaboration, Administration, audit & governance and Export, API & self-hosting). Provenance — Proton Drive: UK / wider Europe; Tresorit: UK / wider Europe. Ratings are the AI panel’s opinion, formed from public evidence: how scores are made.
Proton Drive holds the security bench: encryption and security averages 8.7 to 7.8, with five judges leaning its way and one tie, and sovereignty runs 8.0 to 7.0 on six leans — its verdict records a Swiss entity, self-owned data centres in Switzerland and Germany, and a published GDPR data processing agreement, with payment and support subprocessors such as Stripe and Zendesk processing in the United States under standard contractual clauses. Tresorit takes sharing and collaboration 8.8 to 5.8 and administration and governance 7.0 to 5.8 on six leans each, plus portability and integrations 4.8 to 4.0 on five leans with one tie. Sync and access, 5.8 to 5.7, and pricing transparency, level at 5.8, split one lean either way with four ties each. On weighted totals, five judges put Tresorit ahead; the architect scores both 6.1.
Choose Proton Drive if
You rank encryption and security first: five judges lean Proton Drive there, 8.7 to 7.8, and the verdict records contents, names and metadata encrypted on the device with keys never leaving it.
Your procurement wants a Swiss footing: the verdict records Proton AG contracted under Swiss law, self-owned data centres in Switzerland and Germany, and a published GDPR data processing agreement, and six judges lean Proton Drive on sovereignty, 8.0 to 7.0.
You need long recovery windows: the verdict records ten years of version recovery on paid plans.
You want code you can inspect: the verdict records open-source apps with published Securitum audits and a bug bounty reaching USD 100,000.
Choose Tresorit if
Your work runs through external sharing: six judges lean Tresorit on sharing and collaboration, 8.8 to 5.8, on encrypted links with password, expiry, disabled download and print, watermarks, and file requests for recipients without an account.
You administer a team: six judges lean Tresorit on administration and governance, 7.0 to 5.8.
You weight portability and integrations: five judges lean Tresorit there, 4.8 to 4.0, with one tie.
Your team edits documents in place: the verdict records zero-knowledge office editing on Collabora.
Read this comparison as one judge. Each weighs the same scores by what they care about.
The Agency Producer
Producer at a 30-person video and design agency in Cologne that sends cuts, layouts and raw footage to customers every day and collects their feedback. Wants review links that play in the browser, comments on the file, transfers of 100 GB that do not stall, freelancers added for one project and removed after it, connections to Slack and the project tool, and a storage bill that does not jump when one shoot fills a terabyte.
Proton Drive
Tresorit
This judge's pick
Criterion by criterion
Sync, clients & file access
Proton Drive
Windows and macOS apps with on-demand sync, cloud-only placeholders, pinned offline files, offline edits that re-sync automatically, and automatic resume of interrupted large uploads are documented in detail, mobile apps back up photos automatically, and the pages state transfers without file size limits — exactly what my 100-GB raw footage needs. We found no public information on a Linux desktop app for Drive beyond a command-line tool, on full-text search inside documents, or on access via WebDAV, SFTP or S3, which keeps it a notch below the very top.
Tresorit
Clients cover Windows, Mac and Linux plus iOS and Android with automatic camera upload, offline access and cloud files sitting in the local file manager, and per-file limits are published at 15 GB on Business and 20 GB on Business Pro. An S3-compatible API is documented for automated transfers with content staying end-to-end encrypted. We found no public information on delta sync for large files, full-text search, or WebDAV and SFTP access — and those per-file caps matter when I hand over 100 GB of raw footage.
Sharing & external collaboration
Proton Drive
Password- and expiry-protected links with viewer and editor roles, recipients without a Proton account who can open, download, upload or co-edit, one-click revocation and download counts are all documented, with real-time collaboration in Docs and Sheets named. We found no public information on comments directly on a file, watermarking, download limits or a no-download view, guest accounts with their own permissions, or an Outlook or Teams add-in — and comments on the cut are precisely how my clients give feedback.
Tresorit
Encrypted links with password, expiry, open limits, disabled download and print, dynamic watermarks, allowed viewers and require-email-to-view, plus link activity reports and detailed access logs, give me a customer review link that behaves like a small data room. File requests collect uploads from customers without an account, Outlook, Teams and Gmail add-ins are free, and co-editing is documented on named Collabora Online code with the zero-knowledge model kept intact when sharing. We found no public information on file locking or on revocation reaching copies a client already opened.
Encryption, key custody & recovery
Proton Drive
Every plan encrypts contents, names and other metadata on the device, keys never leave it, sharing stays end-to-end encrypted, the apps are open source, Securitum audit reports are published, a public bug bounty tops out at USD 100,000, SOC 2 Type II and ISO 27001 are stated, and admins can enforce two-factor and configure SAML. The terms state plainly that a misplaced password means data the company cannot recover, and we found no public information on organisation-level key recovery or restoring a whole account to a point in time, which is what keeps it from the top.
Tresorit
Zero-knowledge end-to-end encryption with AES-256 client-side, RSA-4096 key exchange, non-convergent cryptography and HMAC or AEAD integrity checks is documented in a published whitepaper, two-factor and single sign-on exist, ISO 27001:2022 is stated, and a designated Recovery Administrator can regain users' content with their consent. Version restore and deleted-file recovery are described but without a stated history length, and we found no public information on point-in-time restore of a folder or account, ransomware detection, or a named external audit with its report published.
Administration, audit & governance
Proton Drive
Three admin roles with a documented permission matrix, member add and removal — my freelancer-for-one-project workflow — per-user storage, groups, an activity monitor that admins can read and export, and SAML and SCIM configuration are all shown. We found no public information on remote wipe or device management, retention with legal hold, data classification or SIEM integration, and the pages do not describe how far the activity monitor reaches into logins, shares and file actions.
Tresorit
A central admin console with exportable audit logs of who accessed, shared or modified files, Azure AD SSO and SCIM provisioning, Active Directory integration, policy profiles with IP filtering, approved devices and timeout rules, blocking of lost devices, admin password reset and Microsoft Sentinel SIEM integration are all documented. We found no public information on retention policies, legal hold, quotas, or data loss prevention — the pieces that turn an admin console into governance I could sign off for client NDAs.
Export, API & self-hosting
Proton Drive
There is a documented import path from Dropbox, documents export to.docx,.html,.txt,.md and.pdf, users can export personal data themselves, and the data processing agreement promises deletion of company data when a service ends. We found no public information on a REST API, SDKs or webhooks, open-protocol access like WebDAV or S3, a self-hosted edition, or connections to Slack and our project tools, so moving the archive out later is not shown to be tool-independent.
Tresorit
An S3-compatible API is documented for automated transfers with content staying end-to-end encrypted, Microsoft 365, Outlook, Teams and Gmail integrations are named, Bring Your Own Azure Storage can place encrypted content in the customer's own Azure account, and deletion of a removed folder's encrypted content within 90 days is stated. We found no public information on bulk export with the folder structure, migration tools from named providers, webhooks, or a self-hosted or on-premise edition.
European sovereignty
Proton Drive
The contracting entity is Proton AG in Geneva, files sit on the company's own hardware in Switzerland and Germany with biometric data-centre access, disclosure only to competent Swiss authorities is stated, subprocessors are listed with locations and transfer safeguards, a GDPR data processing agreement is published, an EU representative in Luxembourg is named, and ISO 27001 and SOC 2 are stated. Payment through Stripe, PayPal and Chargebee and support through Zendesk and Atlassian run partly in the United States — listed with standard contractual clauses — so the chain is strong but not European end to end.
Tresorit
Tresorit AG is a Swiss company in Zurich, part of Swiss Post, with offices in Germany and Hungary and an EU representative in Budapest; storage is primarily in the EEA or Switzerland with EU, Swiss and other residency regions selectable per user, a subprocessor list is published, a data processing addendum exists and ISO 27001:2022 is stated. The privacy policy acknowledges that personal data may also be transferred to countries outside of the EU or Switzerland, the terms name sub-processors in the United States, and we found no named data centres behind the residency options — European at its core, but the chain is not closed.
Pricing transparency
Proton Drive
Drive Professional is public at €9.99 per user per month discounted to €7.99 with 1 TB per user, consumer plans show exact billed totals such as €47.88 every 12 months for 200 GB, and billing cycles, the 30-day refund and business VAT treatment are all stated. We found no public information on what extra storage costs, on a minimum number of seats, or on any price for the Enterprise plan the admin-roles page names — so when one shoot fills the terabyte, I cannot compute the bill from the pages alone.
Tresorit
FileSharing Business is €12 / user / month starting from 3 users with 1 TB encrypted storage per user, Business Pro is €20 / user / month starting from 5 users with from 15 TB encrypted storage, a yearly 20% discount is published, and VAT-exclusive pricing plus the auto-renewal, no-refund and trial-conversion terms are public. Enterprise is Custom pricing, and we found no public prices for extra storage or add-ons such as eSign, so I cannot compute a full year's bill for thirty people with terabyte-heavy shoots from the pages alone.
Sovereignty, side by side
Dimension
Proton Drive
Tresorit
Legal entity
Not determined
Not determined
Hosting location
Not determined
Not determined
Hosting options
Not determined
Not determined
Open source
Not determined
Not determined
Data processing agreement
Not determined
Not determined
Transfer impact assessment
Not determined
Not determined
Facts, side by side
Only facts both products carry under the same definition — anything else would not be a fair row.
As of 1 Nov 2026, the panel rates Tresorit higher: 3.5/5 against 3/5. Weighted by what each judge cares about, 0 of the 6 judges pick Proton Drive and 5 pick Tresorit, 1 calls it a tie. Which one fits depends on the criteria that matter to you; the table on this page shows both side by side, and each judge’s reading has its own page. Both were scored by the same AI bench under the same rubric, from public evidence only, as the methodology describes.
Is Proton Drive or Tresorit European?
Proton Drive is European (UK / wider Europe). Tresorit is European (UK / wider Europe). Provenance is read from each company’s own legal pages: who builds it and who owns it.
Do Proton Drive and Tresorit have a free plan?
As of 1 Nov 2026, both vendors’ own pages state a free plan. Each product page links the pricing page it was read from.