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ntopng vs MRTG: catalog facts
ntopng	MRTG
Freemium Licensed editions are sold by ntop, listed as models on the product page.	Free Free software under the GNU GPL; sponsorship is optional.
Windows, macOS, Linux, Self-hosted	Windows, Linux, Self-hosted
Application detection powered by nDPI Real-time and historical traffic in a web interface	Simple per-interface traffic graphs over SNMP Can graph almost any numeric data source
Some features need a paid licence Needs a mirror port, TAP or flow exporter to see network traffic	Dated web output compared with modern dashboards Setup is done through configuration files and Perl
Downloadable app, Self-hosted	Downloadable app, Self-hosted
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 October 2, 2026

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