Big transfers fail for boring reasons: a lift, a hotel network, a closed laptop. Chunked resumable uploads fix that, and client-side encryption fixes who can read the result.
“The 40 GB file arrives intact, and the host learns nothing about it.”
For video editors, post-production, 3d and design studios, game teams and anyone whose files break ordinary transfer tools.
Transfers continue after a network drop or a reboot; you resume rather than restart.
Authenticated chunks are sampled and checked so you know the stored copy is exactly what you sent.
Identical content is recognised through a blind index, so re-sending the same master does not re-upload it.
Recipients can stream large video without downloading the whole file, decrypted locally in the browser.
Every public link expires within 24 hours at most, with optional view budgets and instant revocation.
The transfer lands in your encrypted drive, so the file is archived rather than existing only inside a temporary link.
When the sanctioned tool fails at 90% on a deadline evening, someone uploads the master to a personal cloud account. Every leak post-mortem contains that sentence. Reliability at large sizes is therefore a confidentiality control, not a convenience feature.
Encryption runs in a worker pool on your device while chunks upload in parallel, so the bottleneck stays your connection. For typical creative workloads the encrypted path is indistinguishable in wall-clock time from an unencrypted one.
You see when the link was created, when it was first opened and when it expired or was revoked — useful when a client insists the file never arrived.
Practical limits come from your plan's storage rather than from a transfer cap; chunked uploads handle very large single files.
Yes. Encrypted streaming lets them watch while the browser decrypts locally, without the server ever holding plaintext.
No. Files are encrypted on your device with XChaCha20-Poly1305 before the upload starts, using keys derived locally with Argon2id. Our servers hold ciphertext only, so there is no preview, no scanning and no staff view of your transfer.
No. They open the link in any browser, type the passphrase you shared separately, and the file is decrypted locally on their machine. Nothing to install, nothing to sign up for.
Public share links always expire within 24 hours at most, and you can make them shorter, limit the number of views, or revoke them instantly. Expiry is enforced by the system, not by a reminder.
Uploads are chunked, resumable and verified after upload, so multi-gigabyte transfers survive a dropped connection, a closed laptop or a hotel network. You resume instead of starting again.
Yes. The free plan includes 1 GB with exactly the same zero-knowledge architecture as paid plans, so you can test a real client hand-off before paying anything.
Because we cannot read your data, we cannot reset it for you. Each account creates a Recovery Kit — a printable PDF with a QR code — to store offline. That is the same property that keeps anyone else, including us, out of your account.
Start free with 1 GB. Zero-knowledge encryption from the first upload — no admin override, no AI scanning, no plaintext on the server.
