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Independently verified · Quarterly re-audit
EU VETTED
Head-to-head

Microsoft OneDrive vs Tresorit

How Tresorit, a European File sharing tool, compares with Microsoft OneDrive on the signals a privacy-conscious buyer actually checks: who owns it, where it hosts, and its exposure to the US CLOUD Act.

In short

Tresorit (Switzerland, Zurich — Swiss-based, zero-knowledge end-to-end encrypted, CLOUD Act exposure: Material) is the enterprise-grade encrypted alternative to Microsoft OneDrive. OneDrive is part of US-incorporated Microsoft 365 with direct CLOUD Act exposure, and stores files in provider-readable form. Tresorit applies zero-knowledge end-to-end encryption so file contents are unreadable to the vendor. Be precise: Tresorit's current sub-processor chain gives it a material CLOUD Act flag, but because content is end-to-end encrypted, what could be compelled stays unreadable — the encryption, not the hosting label, is the protection.

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Side-by-side

Microsoft OneDrive vs Tresorit, on the sovereignty signals

Compliance and pricing facts, side by side. The right column is pulled live from our verified dataset; the left reflects the incumbent’s public profile.

Microsoft OneDrive vs Tresorit, on the sovereignty signals
Signal Microsoft OneDrive Tresorit
Ownership US-owned Other
Hosting region US / global (Microsoft) Switzerland
CLOUD Act exposure Direct Material
Sovereignty US-LINKED EU-HOSTED
Certifications None listed
ISO 27001
Price from Free 5GB / from $1.99/mo from €10/mo
Visit Tresorit → Read the Tresorit profile →
Verdict

Microsoft OneDrive vs Tresorit: which should you pick?

For genuinely confidential files, Tresorit is the strongest encrypted alternative to OneDrive, because the protection is zero-knowledge encryption, not a hosting label. OneDrive is US-incorporated (Microsoft 365) with direct CLOUD Act exposure and provider-readable storage. Tresorit (Zurich — Swiss-based, zero-knowledge end-to-end encrypted) keeps file contents unreadable to the vendor.

Be precise: Tresorit's current sub-processor chain gives it a material CLOUD Act flag (Material) — but because content is end-to-end encrypted, what could be compelled stays unreadable. The encryption is the substantive protection, which is the opposite of OneDrive's provider-readable model.

Pick OneDrive if deep Microsoft 365 co-authoring and Office integration are central to your work. Pick Tresorit if zero-knowledge encryption, enterprise governance (team folders, SSO, audit logs), and a Swiss operator matter more — the right choice for legal, healthcare, and finance teams handling files that must stay provider-unreadable.

Switching

Migrating from Microsoft OneDrive to Tresorit

OneDrive-to-Tresorit is a folder move into encrypted tresors; co-authoring moves to a separate workflow.

  1. Stage your OneDrive files locally. Download your OneDrive tree (or use the sync client) into a local folder. This is the source you upload from.
  2. Create tresors and upload. Set up Tresorit's encrypted folders (tresors) mirroring your structure, then upload — files are encrypted client-side on the way up.
  3. Reissue sharing and set permissions. Recreate external share links and team-folder permissions in Tresorit (OneDrive links cannot be ported), applying role-based access and any external-sharing policies you need.
  4. Move co-authoring and wind down OneDrive. Decide where live Office co-editing happens, since Tresorit focuses on secure storage and sharing; then confirm access for the team and retire OneDrive once the migration is verified.
FAQ

Microsoft OneDrive vs Tresorit — frequently asked questions

What's the main difference between OneDrive and Tresorit?
End-to-end encryption and the legal protection it provides. OneDrive stores files in provider-readable form on Microsoft's US-incorporated infrastructure, so the US CLOUD Act can in principle reach readable content. Tresorit applies zero-knowledge end-to-end encryption — file contents are unreadable to Tresorit and during transfer. Tresorit's sub-processor chain gives it a material CLOUD Act flag (Material), but the encryption means file contents stay unreadable regardless of what is compelled.
Does OneDrive fall under the US CLOUD Act?
Yes. OneDrive is part of Microsoft 365, operated by Microsoft, a US-incorporated company, so it falls within the reach of the US CLOUD Act regardless of data location, including EU data-residency options. Microsoft publishes an SCC-based DPA and offers EU Data Boundary commitments, so it is legally usable from the EU; the alternative search is about removing provider-readable storage under US jurisdiction for genuinely confidential files.
Why is Tresorit rated material on CLOUD Act if it's Swiss and encrypted?
Because our exposure rating reflects the corporate and sub-processor structure, not the encryption. Tresorit is Swiss-operated, but its current sub-processor chain carries a material CLOUD Act flag, which is why we record it as Material. The crucial mitigation is that file contents are zero-knowledge end-to-end encrypted — so even where the rating is material, the data that could be reached stays unreadable. For confidentiality, the encryption is what matters most.
Can I migrate my OneDrive files to Tresorit?
Yes. Download your OneDrive files to a local staging folder, then upload them into Tresorit's encrypted folders (tresors) — the structure is preserved and files are encrypted client-side on upload. Plan for two things: OneDrive share links cannot be ported and are reissued from Tresorit, and any Microsoft 365 co-authoring on Office files moves to a separate workflow, since Tresorit's focus is secure storage and sharing rather than live co-editing.
Is Tresorit suitable for teams and enterprises?
Yes — that is its core market. Tresorit offers team folders with role-based permissions, SSO (SAML), admin controls, audit logs, and granular external-sharing policies, all on top of zero-knowledge encryption. It is widely used in regulated sectors (legal, healthcare, finance) precisely because file content stays end-to-end encrypted. For enterprises that need provider-unreadable storage with proper admin governance, it is one of the strongest European options.
Is Tresorit more expensive than OneDrive?
Generally yes, because OneDrive is bundled into Microsoft 365 and Tresorit is a specialist encrypted-storage product. Tresorit paid plans start around €10 per user and are priced for its security positioning. The fair comparison is not raw price per GB but the cost of provider-unreadable, zero-knowledge storage with enterprise governance — if that is a compliance requirement, Tresorit's pricing reflects what it delivers.
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METHODOLOGY

How we verified each row above.

For every product we read the public DPA, sub-processors document, hosting region declaration, and corporate ownership records. Each is timestamped. Signals are editorial, re-verified quarterly. We never accept self-attestation.

Reviewed by the EU Vetted editorial team · Editorial guidelines

Last verified June 2026

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