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ntopng vs vnStat: catalog facts
ntopng	vnStat
Freemium Licensed editions are sold by ntop, listed as models on the product page.	Free Free and open source under the GPL.
Windows, macOS, Linux, Self-hosted	Linux, Command line
Application detection powered by nDPI Real-time and historical traffic in a web interface	Very light, no packet sniffing Statistics persist across reboots
Some features need a paid licence Needs a mirror port, TAP or flow exporter to see network traffic	Linux and BSD only Console output by default; graphs need the separate image tool
Downloadable app, Self-hosted	Downloadable app
Closed source	Open source
License not stated	License: GPL
Not stated if an account is 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.