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sFlow-RT vs nfdump: catalog facts
sFlow-RT	nfdump
Free Downloadable from InMon's site; the engine itself is proprietary, not open source.	Free Free and open source under a BSD license.
Self-hosted	Linux, Self-hosted, Command line
Real-time metrics from standard sFlow telemetry REST API with thresholds and notifications	Supports NetFlow, IPFIX and sFlow Filtering and aggregation of stored flow records
Needs devices that export sFlow API-first engine; dashboards come from add-on applications	Command-line only, with no built-in graphical interface Needs network devices configured to export flow data
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Closed source	Open source
License not stated	License: BSD
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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