Tessil vs Tresorit Send
Like Tresorit Send, but open source and EU-hosted. Encrypted, link-based, no account needed.
Tresorit Send is the free transfer tool from Tresorit, a well-regarded Swiss encryption company. It's genuinely end-to-end encrypted and link-based - a close match to what Tessil does. The main catch is that Tresorit is closed source, so you take its encryption claims on trust.
Tessil offers the same model - browser-side encryption, key in the link fragment, no account to send - and publishes every line of its source under AGPL-3.0, so the zero-knowledge claim is auditable rather than asserted.
Hosting is fully in the EU, and there are no ads or third-party trackers anywhere.
| Feature | Tessil | Tresorit Send |
|---|---|---|
| End-to-end encrypted | Yes | Yes |
| Key never reaches the server | Yes | Yes |
| Works without an account | Yes | Yes |
| Open source | Yes (AGPL-3.0) | No |
| Hosting / jurisdiction | EU (Germany + Netherlands) | Switzerland (Tresorit / Swiss Post) |
| Ads & third-party tracking | None | None |
| Price | Free | Free Send + paid Tresorit |
| Link expiry & download limits | Yes | Yes |
| Password protection | Yes | Yes |
Tresorit Send details last verified June 2026. Competitor features and pricing change often - check the provider's own site for current details.
The honest verdict
Tresorit Send is a solid, trustworthy option, especially if you're already in the Tresorit ecosystem. Tessil gives you the same encrypted, link-based experience with the added assurances that come from being fully open source and EU-hosted - and it's free.
If auditability matters to you, that's the deciding line: Tessil's code is public.
Frequently asked questions
How is Tessil different from Tresorit Send?
They're very similar - both are end-to-end encrypted, link-based, and need no account to send. Tessil is open source (AGPL-3.0) and EU-hosted; Tresorit Send is closed source and Swiss-hosted.
Is Tessil really free?
Yes. The current version is free with no paid tier. There are no ads and no third-party trackers.
Can I verify Tessil's encryption?
Yes - the entire codebase is published under AGPL-3.0, so anyone can audit how encryption and key handling work.