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Ostinato vs hping3: catalog facts
Ostinato	hping3
Paid Sold under several license tiers compared on the official site, with a web demo available.	Free Free and open source under the GPL.
Windows, macOS, Linux	macOS, Linux, Command line
Generates and replays custom L2/L3 traffic Runs on standard hardware, including a laptop	Crafts arbitrary packets, so firewall and filtering behaviour can be tested precisely Advanced traceroute and path MTU discovery modes
Commercial licensing rather than a free download Aimed at network engineers; assumes protocol knowledge	Requires root and can disrupt networks if used carelessly Development stopped years ago
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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