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socat vs Packet Sender: catalog facts
socat	Packet Sender
Free Free and open source under the GPL.	Free Free and open source, with no ads or bundled software.
macOS, Linux, Command line	Windows, macOS, Linux, Command line
Connects almost any pair of endpoints, including TLS and serial devices Handles forking servers and complex options netcat cannot	Sends and receives TCP, UDP, SSL and DTLS Command-line tool for scripted tests
The address syntax is dense and unforgiving The project site is served over plain HTTP only, so the repository is linked here instead	Low-level tool that assumes some networking knowledge Panel generator is aimed at control systems, a niche use
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
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 September 23, 2026

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