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SmartSniff vs TCP Viewer: catalog facts
SmartSniff	TCP Viewer
Free Freeware from NirSoft; free to redistribute as long as nothing is charged.	Freemium Free to download; a paid PRO license adds features such as the MCP server.
Windows	macOS
Shows traffic as readable client-server conversations Can capture without installing a driver via Raw Sockets	Wireshark decoding in a native Mac interface Opens saved PCAP and PCAPNG files by drag and drop
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	Apple Silicon and macOS 15 or later only MCP integration requires the paid PRO tier
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: GPL-2.0-or-later
No account needed	Not stated if an account is 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 2, 2026

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