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