Hard Disk Sentinel vs HDD Health Monitor
Hard Disk Sentinel
hdsentinel.com
HDD Health Monitor
hddmonitor.github.ioSide by side
| Figure | Hard Disk Sentinel | HDD Health Monitor |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Windows | Yes | Yes |
| Linux | Yes | — |
| Plans published | 7 | 1 |
| Spec score · Disk Health Monitoring Software | 8.2 (#6) | 7.6 (#17) |
| Drive support | The software supports HDD, SSD, hybrid drives, RAID arrays, external drives, NAS drives, and, in Professional, LTO tape drives and certain industrial memory devices. | Supports ATA/SATA, M.2 SATA, NVMe, USB drives, and SCSI drives, though available data depends on the drive and its controller. |
| Purpose | Hard Disk Sentinel monitors, diagnoses, tests, and reports on hard disk and SSD health, performance degradation, and failures. | Reads raw S.M.A.R.T. data from physical drives and presents drive health information, warnings, and historical trends. |
| Support | Registration includes free life-of-product technical support and help. | The site provides documentation, bug reporting, and an email contact at [email protected]. |
Plans
Hard Disk Sentinel
- DOSFree
- LinuxFree
- TrialFree
- Standard$22, paid once
- Professional$33, paid once
- Professional Family$59, paid once
- Enterprise$219.50, paid once
In their own words
Hard Disk Sentinel
Hard Disk Sentinel has no write-up on Specifiction yet; its figures are above.
HDD Health Monitor
HDD Health Monitor is a free, open-source Windows utility that reads raw S.M.A.R.T. information from physical drives. It shows per-drive health and estimated performance percentages alongside a complete S.M.A.R.T. attribute table. The program scans drives automatically, monitors multiple drives at once, and gives each one its own tray icon and alerts. Notifications can cover temperature, declining health, predictive failure, reallocated sectors, uncorrectable errors, and NVMe critical warnings. While running, it records health and selected attribute snapshots every five seconds and keeps history on disk between sessions. Supported drive types include ATA/SATA, M.2 SATA, NVMe, USB, and SCSI, although available data depends on the drive and controller. USB drives appear shortly after connection and disappear from the selector when unplugged. The standalone executable needs no installer or dependencies, but administrator privileges are required. It supports Windows Vista through Windows 11 and can save a PNG screenshot. The MIT-licensed software costs nothing.