Best Disk Diagnostic Software in 2026
Updated
In short: smartmontools is ranked #1 of 25 as of 4 October 2026, ahead of DiskMaster and Hard Disk Sentinel. The best-ranked option with a free plan is DiskMaster. The lowest first paid tier on this page is BatteryMon at $21/mo.
Drive checks can help you investigate storage issues and review a disk’s reported health. Compare SMART tests and bad-sector scans with surface scans and read/write testing to see which diagnostic functions each entry lists. Platform, bootable media, and maximum drive size can help you assess fit for a machine or maintenance task; free-plan availability and paid-from pricing add cost context. The ranking opens with DiskMaster, Hard Disk Sentinel, and smartmontools, followed by Victoria HDD/SSD and Avidemux. Match the listed checks and supported drive details to what you need to examine.
25 disk diagnostic software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
10 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | smartmontoolsWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.6 | |
| 2 | DiskMasterWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.5 | |
| 3 | Hard Disk SentinelWindows · Linux | Two bars | — | 2 of 6 | Free | 6.5 | |
| 4 | nvmWindows · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.5 | |
| 5 | Active@ Hard Disk MonitorWindows | Two bars | — | 1 of 6 | Free | 6.4 | |
| 6 | Ariolic Disk ScannerWindows | Two bars | — | 1 of 6 | Free | 6.4 | |
| 7 | DRevitalizeWindows | Two bars | — | 1 of 6 | Free | 6.4 | |
| 8 | HDAT2Windows | Two bars | — | 1 of 6 | Free | 6.4 | |
| 9 | MHDDLinux | Two bars | — | 1 of 6 | Free | 6.4 | |
| 10 | Victoria HDD/SSDWindows | Two bars | — | 1 of 6 | Free | 6.4 | |
| 11 | CrystalDiskMarkWindows | No signal | — | — | 1 of 6 | — | 5.2 |
| 12 | GSmartControlWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.2 |
| 13 | HDD RegeneratorWindows · Mac · Linux | Two bars | — | — | 3 of 6 | — | 5.2 |
| 14 | Macrorit Disk ScannerWindows | No signal | — | — | 1 of 6 | — | 5.2 |
| 15 | ValiDriveWindows | No signal | — | — | 1 of 6 | — | 5.2 |
| 16 | STB SuiteWindows · Linux · API | One bar | — | — | 2 of 6 | — | 5.1 |
| 17 | Stellar Drive MonitorWindows · Mac | No signal | — | — | 2 of 6 | — | 5.1 |
| 18 | Atola Disk RecyclerWindows · Self-hosted | One bar | — | — | 1 of 6 | — | 5.0 |
| 19 | BatteryMonWindows | One bar | — | — | 1 of 6 | $21/mo | 5.0 |
| 20 | HDDScanWindows | No signal | — | — | 1 of 6 | — | 5.0 |
| 21 | SpinRiteWindows | One bar | — | — | 1 of 6 | — | 5.0 |
| 22 | HD Tune ProWindows | One bar | — | — | 1 of 6 | $29.95/mo | 4.8 |
| 23 | DriveDxMac | No signal | — | — | 1 of 6 | — | 4.7 |
| 24 | SMARTHDDWindows | No signal | — | — | 1 of 6 | — | 4.7 |
| 25 | StableBit ScannerWindows | No signal | — | — | 1 of 6 | — | 4.7 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which disk diagnostic software is ranked first on Freedom251?
smartmontools is ranked #1 of 25 with a score of 6.6. DiskMaster is second and Hard Disk Sentinel third.
How many of these have a free plan?
10 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, BatteryMon has the lowest first paid tier we found: $21/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.