iotop vs OpenProcMon
iotop
github.comOpenProcMon
github.comSide by side
| Figure | iotop | OpenProcMon |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| Linux | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Process Monitoring Software | 7.6 (#15) | 7.9 (#9) |
| Filtering | The command line supports filtering processes by TID and command using a regular expression. | Users can filter and highlight events by process name, PID, operation, path, result, or category. |
| License | The project says iotop is licensed GPL-2.0+. | The project is released under the MIT License. |
| Purpose | iotop identifies processes that use high amounts of input/output requests on a machine and lists them by I/O usage. | OpenProcMon is an open-source Process Monitor implementation for Windows. |
Plans
In their own words
iotop
iotop is a free Linux program that identifies processes generating high input/output activity and lists them by I/O usage. The display can show accumulated I/O or bandwidth, with optional read, write, swap-in and I/O-percentage columns. Monitoring can target selected process IDs or users, or show processes and threads across the machine. Interactive and batch modes support iteration counts, configurable delays and timestamps in batch output. Command-line filters narrow processes by TID or command using a regular expression. Installation guidance covers Debian-derived distributions, Fedora, CentOS/RHEL, Void, Arch and Alpine Linux; source builds use make after development dependencies are installed. The project is GPL-2.0+ licensed, but installation and use require root access. Version 1.31 is listed as the latest release. Its tag has a verified committer signature, although the signing key has expired.
OpenProcMon
OpenProcMon is a free, open-source process monitor for 64-bit Windows. It tracks process, file system, registry, and network activity in real time, with filters for process name, PID, operation, path, result, or category. Its interface includes a process tree, activity summaries, and call-stack views with per-frame module resolution. The tool reads and writes Sysinternals Process Monitor .PML logs, including logs made with the original Process Monitor. Developers can use its Rust SDK to connect to the driver, choose monitored activity, set filters, and consume parsed events programmatically. For AI-assisted capture and analysis, the procmon-cli MCP server operates over stdio and has setup instructions for clients including Claude Code, Claude Desktop, Codex, and Cursor. Capture tools can export filtered results as PML, CSV, or XML. The v0.5.0 release offers a Windows x64 ZIP with the GUI, CLI/MCP server, console example, skill, and guides. Live capture needs Administrator privileges to load the kernel driver; analyzing an existing .PML file does not. The project is MIT-licensed and its Rust rewrite is described as under active development.