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tcpdump vs sniffglue: catalog facts
tcpdump	sniffglue
Free Free and open source under the BSD licence.	Free Free and open source under the GPL-3.0 license.
Windows, macOS, Linux, Command line	macOS, Linux, Command line
Available on practically every Unix system, including embedded ones Writes standard pcap files that every other tool can read	Parses network packets concurrently using a thread pool Provides default filters for DHCP, DNS, TLS, and HTTP
Needs elevated privileges to capture Output is dense and takes practice to read	Building from source requires libpcap and libseccomp.
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: GPL-3.0
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 October 8, 2026

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