The SwissTransfer alternative with true End-to-End Encryption
Short answer
Filarr Send is a French alternative to SwissTransfer that end-to-end encrypts your files in your browser (AES-256-GCM) before upload. The key travels in the link’s fragment (#), which the browser never sends to the server: we cannot read your files. Free, no account, up to 4 GB in total.
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SwissTransfer hosts in Switzerland, with no end-to-end encryption advertised. Filarr encrypts your files in your browser before upload. No account, free, up to 4 GB in total.
Side-by-side comparison
| Feature | SwissTransfer | Filarr Send |
|---|---|---|
| End-to-End Encryption (E2EE) | No end-to-end encryption advertised | Yes — AES-256-GCM in browser, key in the # fragment |
| Server access to data | Technically possible without end-to-end encryption | Impossible — zero-knowledge model, servers only see ciphertext |
| Hosting | Switzerland (Infomaniak) | Cloudflare R2, Western Europe region — encrypted before upload, unreadable by the host |
| Account required | No for basic transfers | No — neither for sender nor recipient |
| Password protection | Yes | Yes (local Argon2id key derivation) |
| Source available | Not published | Partly — desktop client public (BSL 1.1); Send’s code is delivered to the browser and readable, but not published as a repository |
Comparison provided for information from public sources; third-party offerings change over time.
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Frequently Asked Questions
What is the fundamental difference between SwissTransfer and Filarr?
SwissTransfer (by Infomaniak) is a serious Swiss service, but it does not advertise end-to-end encryption: the confidentiality of your files rests on the host. Filarr Send provides true client-side end-to-end encryption (E2EE): files are encrypted on your machine before upload, and the key travels in the URL fragment (#) which servers never receive.
Why is Swiss hosting alone not always enough?
Swiss law is robust, but still relies on legal trust. If compelled by a court order, a host holding the keys must provide the files. With Filarr, protection is cryptographic: we cannot decrypt your files even if legally compelled.
How much does Filarr Send cost?
Filarr Send is free with no account, up to 4 GB in total. An account raises the limits with your plan, and the Filarr app adds sharing from your vaults.
Try zero-compromise file transfer
Send your first end-to-end encrypted file in 15 seconds. No account, no install.