Proton Drive vs Tresorit 2026: Which Encrypted Storage Wins?

TL;DR verdict

Proton Drive wins for personal use and ecosystem value. Free tier, open-source, and the Proton Unlimited bundle ($9.99/mo for storage + Mail + VPN + Pass) is unmatched. Tresorit wins for professional/compliance use. HIPAA, ISO 27001, strongest cryptographic design per ETH Zurich, and granular enterprise controls.

Comparison table

Feature	Proton Drive	Tresorit
Free tier	5 GB (full E2EE)	No (14-day trial)
Entry paid price	$3.99/mo (200 GB)	$11.99/mo (1 TB)
Encryption	Zero-knowledge E2EE	Zero-knowledge E2EE
Security audit	Open-source (community)	ETH Zurich vindicated
Compliance	GDPR	GDPR + HIPAA + ISO 27001
Ecosystem	Mail, VPN, Pass, Calendar	Storage only
Linux client	CLI only	Full GUI
Jurisdiction	Switzerland	Switzerland (Swiss Post)
Open source	Yes	No

Pricing comparison

Proton Drive is substantially cheaper at every tier and offers a free tier Tresorit doesn’t match. The Proton Unlimited bundle ($9.99/mo) gives you 500 GB storage plus Mail, VPN, Pass, and Calendar — no competitor matches this ecosystem value.

Tresorit justifies its premium with compliance certifications that Proton Drive doesn’t offer.

Security

Both use zero-knowledge E2EE with Swiss jurisdiction. Tresorit has the edge: it was the only provider largely unaffected by the ETH Zurich 2024 vulnerability study. Proton Drive clients are open-source (auditable by anyone), which Tresorit is not.

Collaboration and features

Tresorit offers granular access controls, DRM, admin audit logs, and encrypted file requests — essential for regulated industries. Proton Drive focuses on personal use with encrypted sharing links and photo backup.

Final verdict

Buyer type	Winner	Why
Personal use	Proton Drive	Free tier + ecosystem bundle
Healthcare/legal	Tresorit	HIPAA + ISO 27001
Open-source priority	Proton Drive	Fully open-source clients
Enterprise	Tresorit	Admin controls + compliance
Linux users	Tresorit	Full GUI client

Read the full reviews

Frequently Asked Questions

Is Proton Drive or Tresorit more secure?

Both use zero-knowledge E2EE, but Tresorit has the edge: it was the only provider largely unaffected by the ETH Zurich 2024 vulnerability study and holds GDPR, HIPAA, and ISO 27001 certifications.

Which is cheaper?

Proton Drive is significantly cheaper. Free 5 GB tier, 200 GB at $3.99/mo, or 500 GB + full Proton suite at $9.99/mo. Tresorit starts at $11.99/mo for 1 TB with no free tier.

Which should I choose?

Proton Drive for ecosystem value and personal use. Tresorit for compliance-heavy professional use (healthcare, legal, finance).