Restores we actually test
A backup nobody has restored is a hope, not a backup. We run test restores of real samples on a schedule, and the dashboard shows the result per machine.
last verified restore · shown as a date, not a promise
FILE BACKUP FOR WORK AND HOME PCS — NOT DISK CLONING
Backups a compromised machine cannot destroy.
Every version is locked the moment it lands: the machine that wrote it cannot alter or delete it, and neither can we. We test-restore your backups on a schedule and show you the date it last worked.
Protected — every version locked · restores test-verified on schedule
The difference was never the malware — the same attachment lands in company inboxes and home inboxes alike. The difference is whether your backups can be deleted.
How it works
01
Encrypted before it leaves
AES-256 on the machine itself. What travels and what we store is ciphertext — we cannot read your files.
02
The gate only accepts
Stolen credentials on a compromised PC can add a version. They cannot alter or delete one.
03
Storage that refuses everyone
Under the gate every object carries a retention lock. Until it expires nothing removes that data — not an attacker, not you in a hurry, not us.
Three things you will not find together anywhere else
Locked storage, by default
Compliance-grade retention locks on every backup, for every customer. Not a premium tier, not a checkbox someone forgot to tick — the default.
immutable for the full retention window · 30 / 60 / 90 days
Pricing built for recovery
You pay for stored data, nothing else. Restores are free — we never charge for bandwidth or for recovering your data.
recovery fees · none, ever
Promises with their limits attached
A security claim without its boundary is marketing. Ours ship with the boundary stated — the full list, including what we can't do, is on the security page.
- We can't read your files. Encrypted client-side; we hold a recovery key copy in isolated escrow and say so plainly — every access is logged and shown to you.
- We can't delete your history. Neither can you, until the lock expires — that cuts both ways, and it's the point.
- We can't lock you in. Your data is a standard restic repository, readable with open-source tools. Leaving is a supported feature.
Plain answers
Is this disk cloning or system imaging?
No. ProofBackup protects files — the documents, projects and photos your business — or your household — runs on. Rebuilding Windows is a reinstall; getting your work back is a restore, and that is the part that must never fail.
If ransomware fully controls a PC, can it delete that PC's backups?
No. The machine's credentials can only add new versions — the gate refuses deletion, and beneath it every stored object carries a retention lock that nobody can shorten, including us.
Can you see my files?
No. Files are encrypted on your machine before they leave it. We do hold a recovery copy of your key in an isolated escrow — we say so plainly, and every access to it is logged and shown to you.The full claims contract.
Is this for companies or for home PCs?
Both. It protects files on Windows PCs whether that is one machine at home or a fleet across offices — the same locked storage and the same tested restores either way. See pricing.
How do we leave?
Your data is a standard restic repository, readable with open-source tools. On request you get read-only access plus your repository password — leaving is a supported feature, not a negotiation.
Try it on five machines.
Free trial — 5 devices · 100 GB — no card required. Early access is open now.
Get early access