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EtherApe vs ntopng: catalog facts
EtherApe	ntopng
Free Free open-source software.	Freemium Licensed editions are sold by ntop, listed as models on the product page.
Linux	Windows, macOS, Linux, Self-hosted
Visual view of which hosts are talking and how much Colour-coded protocols	Application detection powered by nDPI Real-time and historical traffic in a web interface
Unix only, with no Windows or macOS build listed An overview tool rather than a detailed packet inspector	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 not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it 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.