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netcat vs hping3: catalog facts
netcat	hping3
Free The open-source tool is available without a license fee.	Free Free and open source under the GPL.
macOS, Linux, Command line	macOS, Linux, Command line
A tiny, universal primitive for scripting any network interaction Present or one package away on almost every Unix system	Crafts arbitrary packets, so firewall and filtering behaviour can be tested precisely Advanced traceroute and path MTU discovery modes
The original 1.10 is legacy; distributions ship various incompatible rewrites No encryption; anything sensitive needs a tunnel around it	Requires root and can disrupt networks if used carelessly Development stopped years ago
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
Not stated if an account is 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 September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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