“Cloud backup” covers two different things that get confused constantly: a backup service you rent, and a backup tool you run that happens to write to remote storage. The second one is what free software gives you, and for a small company it is often the better deal — you choose the storage, you keep the keys, and you are not locked into a subscription that prices by the gigabyte.
What free Windows tools can send off-site
| Tool | Off-site options in the free edition | Commercial use |
|---|---|---|
| Iperius Backup Free | External drives, NAS and network shares on a schedule, with email reports | Allowed |
| SyncBackFree | Network shares and FTP, with content comparison and detailed logs | Explicitly allowed |
| FBackup | Standard ZIP archives to local, network or mapped remote storage | Allowed |
| Personal Backup | File-level backup with filters, scheduling and verification | Allowed |
Direct object-storage connectors are usually a paid feature. The practical workaround is to mount the remote storage as a drive or share on the machine and point the free tool at it — the tool neither knows nor cares where the bytes end up.
The rule that actually matters
Three copies of the data, on two different kinds of media, one of them off-site. The off-site copy is the one that survives fire, theft, a flooded server room and — increasingly the realistic case — ransomware that walks every share the backup account can reach.
Which leads to the part people get wrong: if your backup destination is permanently mounted and writable from the machine being backed up, it is not really off-site. Anything that can encrypt the source can encrypt the destination. Break that path with credentials the source machine does not hold, storage with versioning or object lock, or a copy that is physically disconnected between runs.
A free off-site setup that works
- Local backup first. Iperius Backup Free or SyncBackFree to a NAS or a second disk, nightly. This is your fast restore path for the everyday case of a deleted file.
- Off-site copy second. A separate job to remote storage, with its own credentials — not the ones the workstation uses.
- Encrypt before it leaves. Whatever the storage provider promises, encrypt your archives yourself. FBackup’s standard ZIP output is easy to handle here and readable anywhere.
- Keep versions. One overwritten copy protects against hardware failure and nothing else. Versions protect against the mistake you noticed three days later.
- Get a report on every run. Iperius Backup Free emails job results. A backup nobody hears from is a backup nobody is checking.
- Restore something monthly. See backup verification for what to test and how often.
Bandwidth, the thing that derails off-site backup
The first full upload is the problem. A few hundred gigabytes over a typical office upload link takes days and makes the connection unusable while it runs.
- Seed locally. Do the first copy to a portable disk and move it, then run incrementals over the network.
- Schedule for the night — and confirm it actually finishes before the working day, rather than assuming.
- Cap the job. NetLimiter can limit the backup process so an overrunning job does not take the office offline with it.
- Watch the line. GlassWire Lite shows what the upload is doing in practice, and whether something else is competing with it.
Mail is a separate problem
Hosted mailboxes are not backed up in the way most people assume: retention policies and a recycle bin are not the same as a restorable copy, and both have limits measured in days. MailStore Home archives mail from common clients and servers into a searchable local store, which gives you a copy that outlives the mailbox and the provider’s retention window.
If you run your own mail — hMailServer or Mail-in-a-Box — back up the message store and the configuration together, and test that a restored server actually starts before you rely on it.
Virtual machines
Backing up a running VM by copying its disk files usually produces something that will not boot. Use the hypervisor’s snapshot and export, or back up from inside the guest. One honest warning if you are on the free VMware edition: vSphere Hypervisor‘s free licence does not include the management API, so backup products that rely on it — Veeam among them — will not work. Plan around that before you build anything on it. VirtualBox has its own export and snapshot tooling and no such restriction.
What you give up by not renting a service
A paid backup service gives you managed storage, deduplication, a restore portal, and somebody to call. Running free tools against your own storage gives you control and no recurring bill, in exchange for being the person responsible when it breaks. For a small IT department that already runs its own servers, that trade is usually fine. For a company with no in-house IT, it is not.
FAQ
Is there free backup software that uploads to cloud storage?
Free editions generally lack direct object-storage connectors. Mount the remote storage as a drive or share and point Iperius Backup Free or SyncBackFree at it.
Which free backup tools may be used in a company?
Iperius Backup Free, SyncBackFree, FBackup and Personal Backup all permit commercial use.
How do I protect backups from ransomware?
Make sure the machine being backed up cannot delete or overwrite the off-site copy: separate credentials, versioning or object lock, or media that is disconnected between runs.
Should I encrypt backups myself?
Yes, before they leave your network. Then storage-side encryption is a bonus rather than your only protection — and keep the key somewhere other than the machine being backed up.
Can I back up Microsoft 365 or Google Workspace mail for free?
MailStore Home archives mail into a local searchable store, which gives you a copy independent of the provider’s retention policy.
