Active@ Hard Disk Monitor vs SMART Sniffer
Active@ Hard Disk Monitor
disk-monitor.comSMART Sniffer
github.comSide by side
| Figure | Active@ Hard Disk Monitor | SMART Sniffer |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 2 |
| Spec score · Disk Health Monitoring Software | 9.1 (#1) | 8.3 (#5) |
| Integrations | The documented external connections are SMTP email notifications and network-host monitoring; no third-party integration catalog is listed. | The integration provides a service call with SMART data and assessments that can be passed to Google AI, ChatGPT, Claude, or Ollama. |
| Purpose | Monitors hard disk health using S.M.A.R.T. and scans disk surfaces for bad sectors. | SMART Sniffer monitors disk health and reports early warning signs to Home Assistant. |
| What it does | The utility monitors hard-drive reliability and health to help detect conditions that can precede data loss. | SMART Sniffer combines a Home Assistant custom integration with a Go agent that reads S.M.A.R.T. data and reports drive health. |
Plans
Active@ Hard Disk Monitor
- FreewareFree
- Professional - General license$49.95, paid once
- Professional - Enterprise license$899, paid once
- ProfessionalPrice not published
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.
SMART Sniffer
SMART Sniffer monitors disk health and sends warnings to Home Assistant. A lightweight Go agent runs on each monitored machine, where every drive appears as its own Home Assistant device. Its Attention Needed sensor covers ATA, SATA, NVMe, and SAS drives, returning NO, MAYBE, YES, or UNSUPPORTED. When a drive’s health changes, persistent Home Assistant notifications can appear automatically, with options to escalate, de-escalate, or dismiss them automatically. Agents advertise on the local network through mDNS/Zeroconf, allowing Home Assistant to find them without manual IP entry. Filesystem monitoring is optional; for configured mountpoints, it reports total, used, and available bytes plus usage percentage. An integration service call can provide SMART data and assessments for use with Google AI, ChatGPT, Claude, or Ollama. The agent also exposes HTTP endpoints for health, drive summaries, individual SMART data, and filesystem usage. SMART Sniffer is free and MIT-licensed. It requires smartmontools 7.0 or newer for JSON output; some USB enclosures that block SMART passthrough are reported as unsupported with unknown health.