Active@ Hard Disk Monitor vs Prefail
Active@ Hard Disk Monitor
disk-monitor.com
Prefail
prefail.ioSide by side
| Figure | Active@ Hard Disk Monitor | Prefail |
|---|---|---|
| Price from | Free | $9/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| Linux | — | Yes |
| API | — | Yes |
| Plans published | 4 | 5 |
| Spec score · Disk Health Monitoring Software | 9.1 (#1) | 7.9 (#14) |
| Alerts | Warning or critical conditions can trigger popup notifications or email messages. | Alerts include severity, a human-readable explanation, and an actionable recommendation, with options to acknowledge, mute, or batch dismiss. |
| Integrations | The documented external connections are SMTP email notifications and network-host monitoring; no third-party integration catalog is listed. | The product provides Telegram alerts and a Telegram Mini App dashboard, with email alerts as a fallback. |
| Purpose | Monitors hard disk health using S.M.A.R.T. and scans disk surfaces for bad sectors. | Prefail monitors disk S.M.A.R.T. health and sends alerts about disk problems and recommended actions. |
| Reports | Generates event logs and S.M.A.R.T. reports with detailed disk activity information over time. | Prefail sends a PDF fleet report every Monday describing degraded disks, changes, and what to replace. |
Plans
Active@ Hard Disk Monitor
- FreewareFree
- Professional - General license$49.95, paid once
- Professional - Enterprise license$899, paid once
- ProfessionalPrice not published
Prefail
- FREEFree
- PRO$9 a month
- BUSINESS$39 a month
- SCALE$149 a month
- ENTERPRISEPriced on request
In their own words
Active@ Hard Disk Monitor
Active@ Hard Disk Monitor checks disk health on Windows with S.M.A.R.T. monitoring and surface scans for bad sectors. It can monitor disk performance and state in the background, including when launched at Windows startup. Temperature tools record history, draw graphs, and show the current disk temperature in the system tray. When critical conditions appear, the software can send email or popup notifications. It also creates event logs and S.M.A.R.T. reports containing disk activity information over time. The Pro version adds remote monitoring: it can display disk information and receive notifications from remote computers on a local or global network. Pro also provides temperature graphs across a day, week, month, or specified period. The Freeware plan costs nothing and is for personal use only. Professional is intended for business purposes and can monitor up to 3 PCs remotely; its general license covers personal and commercial use, while its enterprise license is for company offices and branches worldwide. The site lists version 26.0.1, dated February 1, 2026, as a maintenance release.
Prefail
Prefail monitors disk S.M.A.R.T. health across server fleets and sends warnings about problems and possible next steps. Its SENTINEL system weighs more than 25 S.M.A.R.T. attributes to assign each disk a risk score from 0 to 100, with history views showing seven-day changes and whether signals are stable or rising. Alerts include severity, an explanation, and a recommended action, and can be acknowledged, muted, or dismissed in batches. Supported RAID setups include MegaRAID 9260/9361/9460, Adaptec SmartRAID, and Linux mdadm, with visibility into disks behind controllers. Prefail offers Telegram alerts and a Telegram Mini App dashboard, with email as a fallback, plus a weekly PDF fleet report. Its Linux agent is a Bash script that runs smartctl and transmits S.M.A.R.T. output. Prefail says it sends data over TLS and stores it on a dedicated European server. The free tier covers up to two servers; paid plans start at $9/mo. The maker warns that S.M.A.R.T. monitoring cannot catch sudden failures and does not replace backups.