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Malcolm vs ntopng: catalog facts
Malcolm	ntopng
Free Free to use; the source is published on GitHub by CISA.	Freemium Licensed editions are sold by ntop, listed as models on the product page.
Linux, Self-hosted	Windows, macOS, Linux, Self-hosted
Brings PCAP, Zeek and Suricata data together in one searchable interface Deployable with Docker, Kubernetes or an installable ISO	Application detection powered by nDPI Real-time and historical traffic in a web interface
A large multi-container stack that needs substantial server resources Aimed at trained analysts rather than casual home users	Some features need a paid licence Needs a mirror port, TAP or flow exporter to see network traffic
Self-hosted	Downloadable app, Self-hosted
Open source	Closed 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.