Post-quantum · Zero-knowledge
Carved in stone.
Yours alone.
Your memories are nobody’s data.
Sealed on your device. We couldn’t read them if we tried.
No credit card · 5 GB free forever
Try it in ten seconds
Send something now. No account.
Drop a file, get a sealed link. It’s encrypted on your device before it leaves — the key lives only in the link you share.
Drop a file to sendup to 5 GB · sealed link · expires automaticallyWhy StenVault
Built for the threats nobody else is naming.
Zero-knowledge
Cloud providers scan your files to index, train and monetise them.
Everything is zero-knowledge encrypted. There’s nothing readable for us — or a model — to scan.
Per-file keys
One breach exposes everything behind a single master key.
Every file has its own key. A breach of one reveals nothing about the rest.
Post-quantum
Encrypted today, harvested, and broken once quantum computers arrive.
Sealed with post-quantum cryptography, so what you keep stays unreadable — for decades.
How it works
Three steps. Nothing readable leaves.
Choose your files
Pick photos, documents, an entire folder — whatever you need to keep or send.
Encrypted on your device
Sealing happens locally. The plaintext never touches our servers — not once.
Stored privately
Only your key opens it. We hold the vault; you hold the key. By design, not by promise.
Questions
Straight answers.
Your password derives your key — we never see either, so we can’t reset it. That’s the point. Instead, set up Trusted Circle Recovery: your key is split across people you trust, and any threshold of them can help you back in. No master password to forget, no backdoor for anyone else.
Yes. It looks and feels like ordinary cloud storage — drag, drop, preview, share. The encryption happens silently on your device. You never touch a key file or a command line.
Always. A Send link works for anyone — the recipient just clicks and downloads. The decryption key travels inside the link fragment, never to our servers, and the link expires automatically.
Because we’re zero-knowledge and open source, you’re never locked in. You can export everything at any time, and the client is GPL-3.0 — the code to open your vault will always exist, with or without us.
Real. AES-256-GCM payloads, hybrid ML-KEM-768 + X25519 key exchange, Argon2id derivation, per-file keys. The client is open source so anyone can audit exactly what runs on their device.
Free forever with 5 GB. Pro is €5/month (or €48/year) for 200 GB, larger files and Send limits, Trusted Circle Recovery and priority support. No credit card to start.
Yes — the web app runs in any modern browser, on desktop and phone alike. Native mobile apps are on the way. Your vault stays sealed across every device and unlocks only with your key.
Pricing
Start free. Stay free if you like.
Same zero-knowledge encryption on every plan. You only pay for space.
- 5 GB encrypted storage
- Files up to 2 GB
- Send up to 10 GB per link
- Per-file post-quantum keys
- Web app in any browser
- 200 GB encrypted storage
- Files up to 10 GB
- Send up to 25 GB per link
- Trusted Circle Recovery
- Priority support
Seal it once. Keep it for good.
Your files, sealed on your device, readable only by you. Start with 5 GB free.
No credit card · 5 GB free forever