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pmacct vs FastNetMon: catalog facts
pmacct	FastNetMon
Free Free and open source.	Free The Community Edition is free; FastNetMon Advanced is commercial.
Linux, Self-hosted, Command line	macOS, Linux, Command line
Supports NetFlow, IPFIX, sFlow and libpcap Collects BGP, BMP and RPKI routing data	Collects data from common flow protocols and packet capture Can trigger notifications, scripts or BGP announcements
Configured through text files with many keys Aimed at operators rather than home users	Designed for network operators and requires traffic source configuration
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0-only
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 8, 2026

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