About Stash

Stash is a small, independent project building zero-knowledge personal storage.

Why we built it

Most cloud storage providers can read your files. They claim "encryption at rest" and "encryption in transit," and both of those are true — but they hold the keys, which means the data is functionally legible to them and to anyone who serves them a subpoena.

Stash is different. Files are encrypted on your device with keys derived from your password. The server stores opaque ciphertext blobs. No part of our infrastructure ever sees your files in the clear.

What we use

• XChaCha20-Poly1305 for symmetric encryption
• Argon2id for password-based key derivation
• Ed25519 for device-pairing signatures
• Open-source clients (audit the code yourself)

Status

We're in private beta. Capacity is limited and access is by invite. Request access here.

Contact

This site is operated by an individual. For now, contact is by signup form only — we'll reach out via email if your request fits our current capacity.