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tcpflow vs SmartSniff: catalog facts
tcpflow	SmartSniff
Free Free and open source.	Free Freeware from NirSoft; free to redistribute as long as nothing is charged.
Linux, Command line	Windows
Reconstructs full TCP streams into files Works on live capture or saved pcap files	Shows traffic as readable client-server conversations Can capture without installing a driver via Raw Sockets
Command-line only Usually built from source	Official system requirements list Windows versions up to Windows 8 Raw Sockets mode misses outgoing UDP and ICMP packets and is unreliable on some systems
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License: Freeware
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 8, 2026

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