Alternatives to System Informer
An open-source Process Explorer alternative that monitors resources, debugs software and helps detect malware, with no installation needed. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
System Informer
An open-source Process Explorer alternative that monitors resources, debugs software and helps detect malware, with no installation needed.
Replacements
Listings that take over the same core job as System Informer.
Process Explorer
Task Manager with the lid off: shows which process has a file open, which DLLs it loaded, and the full parent-child tree.
Process Explorer from Microsoft shows handles, loaded DLLs and the process tree without installation, but is closed source rather than MIT licensed.
Sysinternals Suite
Microsoft's bundle of Sysinternals troubleshooting and diagnostic utilities for Windows in a single download.
Sysinternals Suite bundles dozens of Microsoft diagnostic tools including Process Explorer in one closed-source download of about 192 MB, with ARM64 and Nano Server builds.
NeoHtop
Inspect running processes in a desktop system monitor.
NeoHtop is a simpler MIT-licensed desktop process monitor for Windows, macOS and Linux with CPU and memory views, search and filtering, without service or kernel detail.
bottom
A graphical system monitor for the terminal, with charts for CPU, memory, network, temperature and disk over time.
bottom moves process monitoring into a terminal on Windows, macOS and Linux, with sorting, tree mode and kill signals plus resource charts over time.
Also worth comparing
These listings name System Informer as their own alternative, so the relationship runs both ways.
Task Manager DeLuxe
A portable Windows task manager replacement with detailed process, service, network and performance monitoring.
System Informer is MIT-licensed and portable, adding stack traces, service control and network connection views, but requires Windows 10 or later and its driver may be flagged.
Similar software
Related functionality, not a direct replacement.
Process Monitor
Logs every file, registry, process, thread and DLL operation on Windows in real time, which is how you find out why something failed.
LatencyMon
DPC latency analyzer that finds the cause of audio dropouts and stutters.
HWiNFO
The deepest hardware report and sensor monitor on Windows, free for personal use.
osquery
Query operating-system information using SQL.
Libre Hardware Monitor
Reads temperatures, fan speeds and voltages straight off the motherboard, and feeds them to other tools.
Sysmon
A Sysinternals service that logs detailed process, network and file activity to the Windows event log.
