Compare software

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

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