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vnStat vs TrafficMonitor: catalog facts
vnStat	TrafficMonitor
Free Free and open source under the GPL.	Free Free and open source.
Linux, Command line	Windows
Very light, no packet sniffing Statistics persist across reboots	Network speed, CPU and memory readings on the taskbar Skins to change the appearance
Linux and BSD only Console output by default; graphs need the separate image tool	Windows only Main documentation is in Chinese, with English translations
Downloadable app	Downloadable app
Open source	Open source
License: GPL	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.