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socat vs tproxy: catalog facts
socat	tproxy
Free Free and open source under the GPL.	Free Free and open source under the MIT licence.
macOS, Linux, Command line	Windows, Linux, Command line
Connects almost any pair of endpoints, including TLS and serial devices Handles forking servers and complex options netcat cannot	Simple way to inspect TCP traffic between two services Shows connection statistics alongside traffic
The address syntax is dense and unforgiving The project site is served over plain HTTP only, so the repository is linked here instead	Some TCP statistics only work on Linux Command line only, with no graphical interface
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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