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SmartSniff vs tcpdump: catalog facts
SmartSniff	tcpdump
Free Freeware from NirSoft; free to redistribute as long as nothing is charged.	Free Free and open source under the BSD licence.
Windows	Windows, macOS, Linux, Command line
Shows traffic as readable client-server conversations Can capture without installing a driver via Raw Sockets	Available on practically every Unix system, including embedded ones Writes standard pcap files that every other tool can read
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	Needs elevated privileges to capture Output is dense and takes practice to read
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: BSD-3-Clause
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 22, 2026

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