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ntopng vs Malcolm: catalog facts
ntopng	Malcolm
Freemium Licensed editions are sold by ntop, listed as models on the product page.	Free Free to use; the source is published on GitHub by CISA.
Windows, macOS, Linux, Self-hosted	Linux, Self-hosted
Application detection powered by nDPI Real-time and historical traffic in a web interface	Brings PCAP, Zeek and Suricata data together in one searchable interface Deployable with Docker, Kubernetes or an installable ISO
Some features need a paid licence Needs a mirror port, TAP or flow exporter to see network traffic	A large multi-container stack that needs substantial server resources Aimed at trained analysts rather than casual home users
Downloadable app, Self-hosted	Self-hosted
Closed source	Open source
License not stated	License not stated
Not stated if an account is 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.