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GoFlow2 vs YAF: catalog facts
GoFlow2	YAF
Free Free and open source.	Free Free and open source under the GPL-2.0-only license.
Linux, Self-hosted, Command line	Linux, Command line
Handles NetFlow, IPFIX and sFlow in one collector Normalises different flow protocols into a common format	Processes live traffic and PCAP files Exports flow records in IPFIX format
Collector only; needs separate storage and dashboards Configuration requires familiarity with flow protocols	YAF is the data collection component of the CERT NetSA Security Suite; downstream tools process its flow data.
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.