Skip to main content
Find answers to the most common questions about how Zas works, what it protects, and what you can expect.
No. Once an item reaches its expiry, it is deleted permanently. Zas never sells storage, retention, or recovery. This is by design: your files are just passing through.
We do not use that phrase. Zas encrypts everything at all times. Nobody reads what you send. No list exists of who has what. The server never sees file hashes because of OPRF blind key derivation. Your content is encrypted on your device before any upload, and only you hold the decryption key.
No. Zas runs in the browser with zero install. Open zas.web on any device and sign in, or use an anonymous session if you are on a machine you do not own. The native Android app is available for deeper integration, but it is not required.
Zas is a browser-based PWA (Progressive Web App) that works on Windows, Mac, Linux, and any modern browser. There is also a native Android app with full parity. An iOS share extension is planned but not yet built.
No. Zas uses Google sign-in only. Your keys derive from your sign-in via OPRF. There is no recovery phrase to store or lose. Keep your Google account secure.
No. Zas pricing is per seat with unlimited devices. You pay for a wider corridor, never for capacity or retention. There is no per-GB charge at any tier.
Everything in transit is removed immediately. Items you sent to shared channels may remain visible to other members until they expire naturally. Public share links stop working right away. There is no recovery.
Yes, through anonymous sessions. You get 30 MB in transit and 2-day expiry. Your session URL is your credential. When you are ready, sign in with Google to convert the session to a permanent account without re-uploading anything.

​
What to read next