The Best Free Backup Software of 2026 (Tested)

Backup software is boring in the best way. If it is doing its job, you never think about it — until the day you do, and by then it is too late to fix. That is why the free tier matters: it is what most people actually use.

The test rig was an ordinary consumer laptop: ~450 GB of user data across documents, photos, and a small video folder. Target was an external SSD for four of the tools and a NAS share for the other three. Each ran on a nightly schedule for a full month.

The good news is that no tool corrupted a file. The bad news is that two of the seven silently stopped after a Windows Update reboot, and a third failed to catch a permission change on a subfolder. Those are the interesting failures to write about, because they happen in real life.

We do not name winners here — the categories differ too much for that. Instead the catalog lists each app with the caveats we saw during the test: which ones handle reboots, which ones handle permission drift, and which ones want a service account.