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netcat vs Tailcat: catalog facts
netcat	Tailcat
Free The open-source tool is available without a license fee.	Free Free and open source under the BSD-3-Clause licence.
macOS, Linux, Command line	Windows, Command line
A tiny, universal primitive for scripting any network interaction Present or one package away on almost every Unix system	No account, login or network setup needed Direct connections with relay fallback
The original 1.10 is legacy; distributions ship various incompatible rewrites No encryption; anything sensitive needs a tunnel around it	No access policy or identity controls like a full tailnet Command line only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: BSD-3-Clause
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
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.