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iftop vs bmon: catalog facts
iftop	bmon
Free Free software under the GPL-2.0-or-later license.	Free Free and open source under BSD and MIT licenses.
Command line	Linux, Command line
Displays current bandwidth usage by pairs of hosts Shows network traffic on a named interface	Interactive curses interface with live graphs Scriptable text output
Requires libpcap and libcurses	Terminal only Development is slow compared with newer tools
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: BSD-2-Clause AND MIT
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 October 8, 2026	Official website Full listing and sources Checked September 24, 2026

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