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vnStat vs NetworkCountersWatch: catalog facts
vnStat	NetworkCountersWatch
Free Free and open source under the GPL.	Free Freeware from NirSoft; it may not be sold or bundled with commercial products.
Linux, Command line	Windows
Very light, no packet sniffing Statistics persist across reboots	Per-interface byte, packet, error and discard counters Live upload and download speed
Linux and BSD only Console output by default; graphs need the separate image tool	Windows XP is not supported Showing all interfaces can list several with identical counters
Downloadable app	Downloadable app
Open source	Closed source
License: GPL	License: Freeware
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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