Redshift — secure file transfer

Send everything.
Reveal nothing.

Anonymous file transfer with end-to-end post-quantum encryption. Private by default. Secure by design. No compromise.

Download on the App Store
Or use the CLI — brew install rshift
See it move
How it works

From a file on your device to a verified delivery on theirs.

The encryption begins on your device and ends on theirs. Everything in between sees ciphertext only.

01

Pick your files

Pick one or more files on iPhone, Mac, or the CLI. A short transfer code appears.

02

Share the code

By text, by link, or by QR. The receiver picks one.

03

Encrypted, end-to-end

The devices connect directly when they can — and fall back to the relay when they can't. Bytes encrypt on yours, decrypt on theirs, and the whole file is verified intact on arrival.

Security

Four properties. None of them require trusting our server.

Post-quantum key exchange

ML-KEM-768 over TLS 1.3. Future quantum computers can't decrypt today's captured traffic.

End-to-end encrypted content

Each transfer derives a unique content key on the sender's device. The relay forwards ciphertext only — it never holds the key.

Coordinator never sees filenames

Real filenames are replaced with file.<ext> before any session metadata leaves your device. The receiver sees the real name only after the encrypted channel is established.

Receivers never sign in

No email, no signup, no recovery flow to get stuck in. Open the link, scan the QR, or paste the code.