alpha · private project, not public yet

A private cloud that can't read your files.

AtomVault keeps your files and passwords in sync across browser, desktop and phone, through a server you host. Everything is encrypted on your device before it leaves.

Open the web app How it works

Browser · Desktop (Windows, macOS) · Mobile (Android, iOS planned)

how it works

The server stores data it cannot read.

Contents, names and folders are encrypted on your device before upload.

your device

  • Taxes/2025/return.pdf
  • Photos/Family/beach.heic
  • Passwords/Mail server
  • Projects/roadmap.docx

the server

  • 0e47b2d8c91fa3…
  • a3d90c517be240…
  • f60b7e13d2a95c…
  • 9c1f58e0b37d6a…

features

Files and passwords, in one place.

Versions and undo

Earlier versions are kept. Deleted files come back for 180 days.

Password vault

Logins, cards, SSH keys and one-time codes, in folders.

Share with people

Share a folder with a person or a group. Still end-to-end encrypted.

Admin without access

Manage users, groups and storage without seeing any content.

Pair with a QR code

Add a phone or computer in seconds. Works offline, too.

Self-hosted

Runs on your own server, with Docker or Home Assistant.

security

Strong encryption, in plain words.

No one but you and the people you share with can read your data. Not the server, not its admin.

Technical details
Contents
XChaCha20-Poly1305, 64 KiB chunks, padded sizes
Sharing keys
HPKE with X-Wing (X25519 + ML-KEM-768)
Signatures
Ed25519
Device keys
P-256 in the OS keychain / Android Keystore
Login
Signed requests + WebAuthn passkeys

Only you hold the keys

Keys are made on your devices and never leave them unencrypted.

Ready for quantum computers

Post-quantum encryption keeps data stored today safe in the future.

Every change is signed

If anyone alters or removes data on the server, your apps notice.

No password to steal

Sign in with a passkey: your fingerprint, face or PIN.

apps

Browser, desktop and mobile.

Not publicly released yet. Everything is in private testing.

  • Web apppreviewRuns in any modern browserOpen
  • DesktopalphaWindows and macOS · internal testing
  • MobilealphaAndroid in internal testing · iOS planned