What Tresorit actually does
Tresorit builds cloud storage around zero-knowledge encryption from the start, encrypting files on your device before they ever reach its servers, so the company says it can't see what it's storing even if asked to.
The core product
Tresorit is a Swiss company, majority-owned by Swiss Post, that positions its entire product around end-to-end, zero-knowledge encryption rather than adding it as an option. Files are encrypted locally on your device before upload, and Tresorit states it has no ability to read their contents on its own servers.
Apps cover Windows, macOS, Linux, Android, iOS, and the web, syncing encrypted files across all of them with secure link sharing built in. The free Basic plan is a genuine standing account rather than a disguised trial: 3GB of encrypted storage with no expiry date, though it caps things well below the paid tiers:
- A maximum file size of 500MB
- Syncing across only two devices
- Up to 10 shared links a month
What's new or notable
According to Tresorit's own pricing page, the paid Personal plans scale in three steps:
- Lite: €3.99/month for 50GB across two devices
- Essential (the most popular tier): €9.99/month for 1TB across up to 10 devices, with a higher 10GB maximum file size and 10 previous file versions kept
- Pro: €23.99/month for 4TB, also across 10 devices, extending version history to 25 previous versions and adding features like file requests and detailed access logs
All three paid tiers come with a 14-day free trial and roughly 20% off when billed annually instead of monthly.
Who should use Tresorit
Great fit if…
- Zero-knowledge encryption is a hard requirement — files are encrypted before they leave your device, and Tresorit says it cannot read them even on its own infrastructure.
- You want a real free plan, not a trial — Basic gives 3GB with no expiry date, so there's no countdown pushing you to pay before you're ready.
- You need detailed version history or access logs — the higher Essential and Pro tiers keep 10 or 25 previous file versions and add detailed access logging that lighter competitors often skip.
- You're comfortable paying a premium for privacy — the pricing reflects the zero-knowledge model rather than competing purely on storage-per-euro.
Skip it if…
- You need to share large files often — the free plan caps uploads at 500MB per file and only 10 shared links a month, limits that a heavy sharer will hit quickly.
- You're price-sensitive on storage — 1TB on Essential runs €9.99/month and 4TB on Pro runs €23.99/month, both noticeably above mainstream cloud storage at similar capacity.
- You need more than two synced devices without upgrading — the free Basic plan is capped at two devices, so a phone-plus-laptop-plus-desktop setup needs a paid tier.
Pricing in detail
Tresorit publishes four tiers for individuals; the figures below come directly from its own pricing page.
| Plan | Price | What's included |
|---|---|---|
| Basic | Free, no expiry | 3GB storage, 2 synced devices, 500MB max file size, up to 10 shared links per month |
| Personal Lite | €3.99/month | 50GB storage, 2 devices, 2GB max file size, 5 previous file versions kept |
| Personal Essential | €9.99/month | 1TB storage, up to 10 devices, 10GB max file size, 10 previous file versions, document scanning via the app |
| Personal Pro | €23.99/month | 4TB storage, up to 10 devices, 10GB max file size, 25 previous file versions, file requests and detailed access logs |
All three paid plans include a 14-day free trial and roughly 20% off when billed yearly instead of monthly, per Tresorit's site.
Where it falls short
- Free plan is tightly capped — a 500MB file-size limit, two-device sync, and 10 shared links a month will feel restrictive to anyone handling larger files or sharing regularly.
- Paid storage costs more than mainstream competitors — the tradeoff for zero-knowledge encryption is a noticeably higher price per gigabyte than typical consumer cloud storage.
- Jumping tiers means a big storage leap — the gap between Lite's 50GB and Essential's 1TB is large, so there's no mid-sized paid option for someone who only needs, say, 200GB.
Privacy & data
Tresorit's privacy model centers on encrypting files on the user's device before upload, with the company stating it never holds the keys needed to decrypt customer data on its own servers — a genuine zero-knowledge design rather than encryption-at-rest that the provider could still unlock.
Tresorit is headquartered in Zurich, Switzerland, and has been majority-owned by Swiss Post, the Swiss postal service, since 2021, which gives it a state-linked majority owner in a country outside the EU but with its own strong data protection framework. Beyond the zero-knowledge architecture itself, we did not independently verify a specific recent third-party security audit for this listing.
How we checked this
This entry is based on Tresorit's own pricing page at tresorit.com/pricing, checked on 2026-09-04, which lists the Basic free tier and the Lite, Essential, and Pro paid tiers with their storage, device, and version-history limits. We did not run our own encryption testing or file-transfer benchmarks; the zero-knowledge claim reflects Tresorit's own published description of its architecture rather than independent penetration testing performed for this listing.