SpaceBox is a fundamentally different way to store and move files. It decentralises cloud storage to put control back with you, combining client-side post-quantum encryption with off-grid storage, so your data stays yours and no one else's to hand over.
Cloud providers such as Microsoft and Google are legally required to grant authorities access to the data stored on their platforms. A "backdoor" for law enforcement might sound reasonable, but it carries a real cost.
The security teams that maintain these systems, the employees who work on them, and potentially their contacts, could all become a path to your most sensitive information. You're trusting not just the company, but everyone with access inside it.
Getting at data on public cloud services is complex and resource-intensive. But if your files are valuable enough that an adversary would invest serious resources to obtain them, that complexity isn't a guarantee, it's a delay. That's when you should be using SpaceBox.
Your data is encrypted on your own device, computer or phone, before it's ever transmitted, using post-quantum ML-KEM-768 with AES-256-GCM. Only your device holds the key, so only someone with your device can read the data. We store ciphertext, and we can't open it.
Live now · every tierIn the full release, the servers that hold your data have no conventional connection to the open internet. Network-based threats like ransomware simply can't reach them, even if an attacker gets into your other accounts. Delivered by the Hardware appliance and the coming space tier.
Full release · Hardware & SpacePost-quantum encryption is no longer ours alone. Internxt already ships ML-KEM, and Proton plans to bring it to Drive by late 2026; Tresorit, pCloud and Sync.com are still on classic AES and RSA. So we're ahead of most of the field, not all of it. The difference that matters is structural: every service below is a cloud account you sign into, run by a company that can be legally compelled, in its own jurisdiction, to hand over what it holds. SpaceBox is built to leave as little as possible to compel.
| Capability | SpaceBox | Proton Drive | Tresorit | Internxt | pCloud | Sync.com | Google Drive | OneDrive |
|---|---|---|---|---|---|---|---|---|
| Post-quantum key exchange | ✓ | Roadmap | ✗ | ✓ | ✗ | ✗ | ✗ | ✗ |
| Zero-knowledge (ciphertext only) | ✓ | ✓ | ✓ | ✓ | Add-on | ✓ | ✗ | ✗ |
| Send with no account, no PII | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ |
| Passwordless, keys only on your device | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ |
| Off-territory / air-gapped storage | Planned | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ |
| Servers sit in | CZ → off-territory | Switzerland | EU / CH | EU (Spain) | Switzerland | Canada | US / global | US / global |
Based on each provider's public documentation, July 2026. For correcting any mistake in this table, contact us at legal@i46.cz.
Start free with SpaceBox Lite, encrypted on your device, stored as ciphertext only. No card, no email.