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Arkime vs ntopng: catalog facts
Arkime	ntopng
Free The open-source software is available without a license fee. Hosting, hardware and…	Freemium Licensed editions are sold by ntop, listed as models on the product page.
Linux, Self-hosted, Web	Windows, macOS, Linux, Self-hosted
Indexes sessions while retaining packet data in PCAP format.	Application detection powered by nDPI Real-time and historical traffic in a web interface
Large captures require substantial storage and careful retention settings.	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: Apache-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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